Cleanup gtest cmake config

Author: vitaut

test/gtest/CMakeLists.txt

@@ -1,7 +1,7 @@
 #------------------------------------------------------------------------------
 # Build the google test library
 
-# We compile Google Test ourselves instead of using pre-compiled libraries.
+# Compile Google Test ourselves instead of using pre-compiled libraries.
 # See the Google Test FAQ "Why is it not recommended to install a
 # pre-compiled copy of Google Test (for example, into /usr/local)?"
 # at http://code.google.com/p/googletest/wiki/FAQ for more details.
@@ -19,14 +19,10 @@ else ()
 endif ()
 
 if (MSVC)
-  # Disable MSVC warnings of _CRT_INSECURE_DEPRECATE functions.
+  # Disable MSVC warnings about _CRT_INSECURE_DEPRECATE functions.
   target_compile_definitions(gtest PRIVATE _CRT_SECURE_NO_WARNINGS)
   if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-    # Disable MSVC warnings of POSIX functions.
+    # Disable MSVC warnings about POSIX functions.
     target_compile_options(gtest PUBLIC -Wno-deprecated-declarations)
   endif ()
 endif ()
-
-# Silence MSVC tr1 deprecation warning in gmock.
-target_compile_definitions(gtest
-  PUBLIC _SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING=1)