Merge pull request swiftlang#22812 from apple/warnings-have-reined

Author: swift-ci

docs/WindowsBuild.md

@@ -157,7 +157,6 @@ cmake -G Ninja^
  -DCMAKE_BUILD_TYPE=RelWithDebInfo^
  -DCMAKE_C_COMPILER=clang-cl^
  -DCMAKE_CXX_COMPILER=clang-cl^
- -DCMAKE_CXX_FLAGS:STRING="-Wno-c++98-compat -Wno-c++98-compat-pedantic"^
  -DCMAKE_EXE_LINKER_FLAGS:STRING="/INCREMENTAL:NO"^
  -DCMAKE_SHARED_LINKER_FLAGS:STRING="/INCREMENTAL:NO"^
  -DSWIFT_BUILD_SOURCEKIT=ON^