[lit] Remove unused imports (NFC)

Reviewers: ddunbar, echristo, beanz

Patch by Brian Gesiak!

Subscribers: llvm-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D25169

llvm-svn: 283089

llvm/utils/lit/lit/formats/base.py

@@ -1,6 +1,5 @@
 from __future__ import absolute_import
 import os
-import sys
 
 import lit.Test
 import lit.util

llvm/utils/lit/lit/main.py

@@ -7,7 +7,12 @@ See lit.pod for more information.
 """
 
 from __future__ import absolute_import
-import math, os, platform, random, re, sys, time
+import os
+import platform
+import random
+import re
+import sys
+import time
 import tempfile
 import shutil
 

llvm/utils/lit/tests/Inputs/shtest-timeout/infinite_loop.py

@@ -1,7 +1,6 @@
 # RUN: %{python} %s
 from __future__ import print_function
 
-import time
 import sys
 
 print("Running infinite loop")

llvm/utils/lit/tests/Inputs/shtest-timeout/short.py

@@ -1,6 +1,4 @@
 # RUN: %{python} %s
 from __future__ import print_function
 
-import sys
-
 print("short program")