delete unneeded code

Author: akuhlens

flang/lib/Support/CMakeLists.txt

@@ -44,7 +44,6 @@ endif()
 
 add_flang_library(FortranSupport
   default-kinds.cpp
-  enum-class.cpp
   Flags.cpp
   Fortran.cpp
   Fortran-features.cpp

flang/lib/Support/Fortran-features.cpp

@@ -77,11 +77,6 @@ LanguageFeatureControl::LanguageFeatureControl() {
         std::string_view{cliOption};
   });
 
-  replaceCliCanonicalSpelling(UsageWarning::F202XAllocatableBreakingChange,
-      "f202x-allocatable-breaking-change");
-
-  // If we need to
-
   // These features must be explicitly enabled by command line options.
   disable_.set(LanguageFeature::OldDebugLines);
   disable_.set(LanguageFeature::OpenACC);