[Flang][NFC] Remove license comments from files in docs/ folder.

Solves issue https://reviews.llvm.org/D86131#2247275

Reviewed By: hans

Differential Revision: https://reviews.llvm.org/D86875

flang/docs/ArrayComposition.md

@@ -1,11 +1,3 @@
-<!--===- docs/ArrayComposition.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 This note attempts to describe the motivation for and design of an
 implementation of Fortran 90 (and later) array expression evaluation that
 minimizes the use of dynamically allocated temporary storage for

flang/docs/C++17.md

@@ -1,11 +1,3 @@
-<!--===- docs/C++17.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 ## C++14/17 features used in f18
 
 The C++ dialect used in this project constitutes a subset of the

flang/docs/C++style.md

@@ -1,11 +1,3 @@
-<!--===- docs/C++style.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 ## In brief:
 * Use *clang-format*
 from llvm 7

flang/docs/Calls.md

@@ -1,11 +1,3 @@
-<!--===- docs/Calls.md
-
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
--->
-
 ## Procedure reference implementation protocol
 
 Fortran function and subroutine references are complicated.

flang/docs/Character.md

@@ -1,11 +1,3 @@
-<!--===- docs/Character.md
-
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
--->
-
 ## Implementation of `CHARACTER` types in f18
 
 ### Kinds and Character Sets

flang/docs/ControlFlowGraph.md

@@ -1,11 +1,3 @@
-<!--===- docs/ControlFlowGraph.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 ## Concept
 After a Fortran subprogram has been parsed, its names resolved, and all its
 semantic constraints successfully checked, the parse tree of its

flang/docs/Directives.md

@@ -1,11 +1,3 @@
-<!--===- docs/Directives.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 Compiler directives supported by F18
 ====================================
 

flang/docs/Extensions.md

@@ -1,11 +1,3 @@
-<!--===- docs/Extensions.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 As a general principle, this compiler will accept by default and
 without complaint many legacy features, extensions to the standard
 language, and features that have been deleted from the standard,

flang/docs/FortranForCProgrammers.md

@@ -1,11 +1,3 @@
-<!--===- docs/FortranForCProgrammers.md
-
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
--->
-
 Fortran For C Programmers
 =========================
 

flang/docs/FortranIR.md

@@ -1,11 +1,3 @@
-<!--===- docs/FortranIR.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 # Design: Fortran IR
 
 ## Introduction

flang/docs/IORuntimeInternals.md

@@ -1,11 +1,3 @@
-<!--===- docs/IORuntimeInternals.md
-
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
--->
-
 Fortran I/O Runtime Library Internal Design
 ===========================================
 

flang/docs/ImplementingASemanticCheck.md

@@ -1,11 +1,3 @@
-<!--===- docs/ImplementingASemanticCheck.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-# Introduction
 I recently added a semantic check to the f18 compiler front end.  This document
 describes my thought process and the resulting implementation.
 

flang/docs/Intrinsics.md

@@ -1,11 +1,3 @@
-<!--===- docs/Intrinsics.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 # A categorization of standard (2018) and extended Fortran intrinsic procedures
 
 This note attempts to group the intrinsic procedures of Fortran into categories

flang/docs/LabelResolution.md

@@ -1,11 +1,3 @@
-<!--===- docs/LabelResolution.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 # Semantics: Resolving Labels and Construct Names
 
 ## Overview

flang/docs/ModFiles.md

@@ -1,11 +1,3 @@
-<!--===- docs/ModFiles.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 # Module Files
 
 Module files hold information from a module that is necessary to compile 

flang/docs/OpenMP-semantics.md

@@ -1,11 +1,3 @@
-<!--===- docs/OpenMP-semantics.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 # OpenMP Semantic Analysis
 
 ## OpenMP for F18

flang/docs/OptionComparison.md

@@ -1,11 +1,3 @@
-<!--===- docs/OptionComparison.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 # Compiler options
 
 This document catalogs the options processed by F18's peers/competitors.  Much of the document is taken up by a set of tables that list the options categorized into different topics.  Some of the table headings link to more information about the contents of the tables.  For example, the table on **Standards conformance** options links to [notes on Standards conformance](#standards).

flang/docs/Overview.md

@@ -1,11 +1,3 @@
-<!--===- docs/Overview.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 # Overview of Compiler Phases
 
 Each phase produces either correct output or fatal errors.

flang/docs/ParserCombinators.md

@@ -1,11 +1,3 @@
-<!--===- docs/ParserCombinators.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 ## Concept
 The Fortran language recognizer here can be classified as an LL recursive
 descent parser.  It is composed from a *parser combinator* library that

flang/docs/Parsing.md

@@ -1,11 +1,3 @@
-<!--===- docs/Parsing.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 The F18 Parser
 ==============
 This program source code implements a parser for the Fortran programming

flang/docs/Preprocessing.md

@@ -1,11 +1,3 @@
-<!--===- docs/Preprocessing.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 Fortran Preprocessing
 =====================
 

flang/docs/PullRequestChecklist.md

@@ -1,11 +1,3 @@
-<!--===- docs/PullRequestChecklist.md 
-
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-
--->
-
 # Pull request checklist
 Please review the following items before submitting a pull request.  This list
 can also be used when reviewing pull requests.

flang/docs/RuntimeDescriptor.md

@@ -1,11 +1,3 @@
-<!--===- docs/RuntimeDescriptor.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 ## Concept
 The properties that characterize data values and objects in Fortran
 programs must sometimes be materialized when the program runs.

flang/docs/Semantics.md

@@ -1,11 +1,3 @@
-<!--===- docs/Semantics.md 
-  
-   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-   See https://llvm.org/LICENSE.txt for license information.
-   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-  
--->
-
 # Semantic Analysis
 
 The semantic analysis pass determines if a syntactically correct Fortran