Drop a StringMap.h include, NFC

$ diff -u <(sort thedeps-before.txt) <(sort thedeps-after.txt) \
    | grep '^[-+] ' | sort | uniq -c | sort -nr
    231 -    llvm/include/llvm/ADT/StringMap.h
    171 -    llvm/include/llvm/Support/AllocatorBase.h
    142 -    llvm/include/llvm/Support/PointerLikeTypeTraits.h

llvm/include/llvm/Support/Host.h

@@ -13,11 +13,13 @@
 #ifndef LLVM_SUPPORT_HOST_H
 #define LLVM_SUPPORT_HOST_H
 
-#include "llvm/ADT/StringMap.h"
-
 #include <string>
 
 namespace llvm {
+class MallocAllocator;
+class StringRef;
+template <typename ValueTy, typename AllocatorTy> class StringMap;
+
 namespace sys {
 
   /// getDefaultTargetTriple() - Return the default target triple the compiler
@@ -50,7 +52,7 @@ namespace sys {
   /// all valid LLVM feature names.
   ///
   /// \return - True on success.
-  bool getHostCPUFeatures(StringMap<bool> &Features);
+  bool getHostCPUFeatures(StringMap<bool, MallocAllocator> &Features);
 
   /// Get the number of physical cores (as opposed to logical cores returned
   /// from thread::hardware_concurrency(), which includes hyperthreads).

llvm/lib/ExecutionEngine/JITLink/MachOLinkGraphBuilder.h

@@ -13,6 +13,8 @@
 #ifndef LIB_EXECUTIONENGINE_JITLINK_MACHOLINKGRAPHBUILDER_H
 #define LIB_EXECUTIONENGINE_JITLINK_MACHOLINKGRAPHBUILDER_H
 
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/StringMap.h"
 #include "llvm/ExecutionEngine/JITLink/JITLink.h"
 
 #include "EHFrameSupportImpl.h"

llvm/lib/Object/ArchiveWriter.cpp

@@ -12,6 +12,7 @@
 
 #include "llvm/Object/ArchiveWriter.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/BinaryFormat/Magic.h"
 #include "llvm/IR/LLVMContext.h"

llvm/lib/Support/FoldingSet.cpp

@@ -13,6 +13,7 @@
 
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/Hashing.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Host.h"

llvm/lib/Support/Host.cpp

@@ -11,9 +11,9 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/Host.h"
-#include "llvm/Support/TargetParser.h"
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/ADT/Triple.h"
@@ -21,6 +21,7 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/TargetParser.h"
 #include "llvm/Support/raw_ostream.h"
 #include <assert.h>
 #include <string.h>

llvm/tools/dsymutil/BinaryHolder.h

@@ -14,6 +14,7 @@
 #define LLVM_TOOLS_DSYMUTIL_BINARYHOLDER_H
 
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/Object/Archive.h"
 #include "llvm/Object/Error.h"