Remove unused and broken MSVC_CFLAGS macro

commit_hash:77052d9e455cd78788a38bf0a6361fbc9cef8b14

Author: georgthegreat

build/ymake.core.conf

@@ -3994,7 +3994,7 @@ macro LDFLAGS(Flags...) {
 ###
 ### Add the specified flags to the compilation command of C and C++ files.
 ### @params: GLOBAL - Propagates these flags to dependent projects
-### Note: remember about the incompatibility flags for clang and cl (to set flags specifically for cl.exe use MSVC_FLAGS).
+### Bear in mind that certain flags might be incompatible with certain compilers.
 macro CFLAGS(Flags...) {
    SET_APPEND_WITH_GLOBAL(USER_CFLAGS $Flags)
 }
@@ -5806,23 +5806,6 @@ when ($WITH_CREDITS) {
     GENERATE_MF=$GENERATE_MF_CMD
 }
 
-# tag:flags tag:internal tag:windows-specific
-### @usage: _MSVC_FLAGS_WINDOWS_IMPL(target_platform compiler_flags) # internal
-###
-### Add CFLAGS when the firts argument is WINDOWS
-macro _MSVC_FLAGS_WINDOWS_IMPL(WINDOWS[], FLAGS...) {
-    CFLAGS($WINDOWS)
-}
-
-# tag:flags tag:windows-specific tag:cpp-specific
-### @usage: MSVC_FLAGS([GLOBAL compiler_flag]* compiler_flags)
-###
-### Add the specified flags to the compilation line of C/C++files.
-### Flags apply only if the compiler used is MSVC (cl.exe)
-macro MSVC_FLAGS(FLAGS...) {
-    _MSVC_FLAGS_WINDOWS_IMPL($TARGET_PLATFORM $FLAGS)
-}
-
 # tag:internal
 ### Add passed ya.conf.json and all bottle's formula external files to resources
 ### File MUST be arcadia root relative path (without "${ARCADIA_ROOT}/" prefix).