diff --git a/llvm/include/llvm/Support/TargetParser.h b/llvm/include/llvm/Support/TargetParser.h
--- a/llvm/include/llvm/Support/TargetParser.h
+++ b/llvm/include/llvm/Support/TargetParser.h
@@ -158,12 +158,7 @@
 enum FeatureKind : unsigned {
   FK_INVALID = 0,
   FK_NONE = 1,
-  FK_STDEXTM = 1 << 2,
-  FK_STDEXTA = 1 << 3,
-  FK_STDEXTF = 1 << 4,
-  FK_STDEXTD = 1 << 5,
-  FK_STDEXTC = 1 << 6,
-  FK_64BIT = 1 << 7,
+  FK_64BIT = 1 << 2,
 };
 
 bool checkCPUKind(CPUKind Kind, bool IsRV64);