修复一个cmake错误

Cpp/ThirdParty/gmock/CMakeLists.txt

@@ -1,9 +1,6 @@
 SET(GmockSrc
 	src/gmock-all.cc
 )
-
-SOURCE_GROUP(gmock *.*)
-
 INCLUDE_DIRECTORIES(.)
 ADD_LIBRARY(gmock ${GmockSrc})
 SET_PROPERTY(TARGET gmock PROPERTY FOLDER "ThirdParty")