Revert "Preprocessor: Add __ALIGNOF_MAX_ALIGN_T__"

This commit reverts r201037, it's functionality is not needed given the
definition of std::max_align_t in libcxx circa r201843.

llvm-svn: 202667

clang/lib/Frontend/InitPreprocessor.cpp

@@ -602,9 +602,6 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
   DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder);
   DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder);
 
-  Builder.defineMacro("__ALIGNOF_MAX_ALIGN_T__",
-                      Twine(TI.getSuitableAlign() / TI.getCharWidth()));
-
   DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F");
   DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), "");
   DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L");