[Hexagon] Remove ValidArch (NFC)

This function seems to be unused for at least one year.

diff --git a/llvm/lib/Target/Hexagon/HexagonArch.h b/llvm/lib/Target/Hexagon/HexagonArch.h
index e5d5283..4a42ec9 100644 (file)
--- a/llvm/lib/Target/Hexagon/HexagonArch.h
+++ b/llvm/lib/Target/Hexagon/HexagonArch.h
@@ -19,12 +19,6 @@ namespace llvm {
 namespace Hexagon {
 
 template <class ArchCont, typename Val>
-bool ValidArch(ArchCont const &ArchList, Val HexArch) {
-  return std::any_of(std::begin(ArchList), std::end(ArchList),
-                     [HexArch](Val V) { return V == HexArch; });
-}
-
-template <class ArchCont, typename Val>
 llvm::Optional<ArchEnum> GetCpu(ArchCont const &ArchList, Val CPUString) {
   llvm::Optional<ArchEnum> Res;
   auto Entry = ArchList.find(CPUString);