[VE] Remove obsoleted getVEAsmModeForCPU function

[simoll]

Feel free to commit something like this without review

clang/lib/Driver/ToolChains/Arch/VE.h

 
 namespace clang {
 namespace driver {
 namespace tools {
 namespace ve {
 
 void getVETargetFeatures(const Driver &D, const llvm::opt::ArgList &Args,
                          std::vector<llvm::StringRef> &Features);
-const char *getVEAsmModeForCPU(llvm::StringRef Name,
-                               const llvm::Triple &Triple);
 
 } // end namespace ve
 } // namespace tools
 } // end namespace driver
 } // end namespace clang
 
 #endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_ARCH_VE_H

clang/lib/Driver/ToolChains/Arch/VE.cpp

 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Option/ArgList.h"
 
 using namespace clang::driver;
 using namespace clang::driver::tools;
 using namespace clang;
 using namespace llvm::opt;
 
-const char *ve::getVEAsmModeForCPU(StringRef Name, const llvm::Triple &Triple) {
-  return "";
-}
-
 void ve::getVETargetFeatures(const Driver &D, const ArgList &Args,
                              std::vector<StringRef> &Features) {}