diff --git a/llvm/include/llvm/Support/X86TargetParser.def b/llvm/include/llvm/Support/X86TargetParser.def
index ed41295166b35e..4b96c66b0e2901 100644
--- a/llvm/include/llvm/Support/X86TargetParser.def
+++ b/llvm/include/llvm/Support/X86TargetParser.def
@@ -226,6 +226,5 @@ X86_FEATURE       (RETPOLINE_INDIRECT_BRANCHES, "retpoline-indirect-branches")
 X86_FEATURE       (RETPOLINE_INDIRECT_CALLS,    "retpoline-indirect-calls")
 X86_FEATURE       (LVI_CFI,                     "lvi-cfi")
 X86_FEATURE       (LVI_LOAD_HARDENING,          "lvi-load-hardening")
-X86_FEATURE       (SESES,                       "seses")
 #undef X86_FEATURE_COMPAT
 #undef X86_FEATURE
diff --git a/llvm/lib/Support/X86TargetParser.cpp b/llvm/lib/Support/X86TargetParser.cpp
index cbb7f6186d0d77..7e87d65a7c566e 100644
--- a/llvm/lib/Support/X86TargetParser.cpp
+++ b/llvm/lib/Support/X86TargetParser.cpp
@@ -446,7 +446,6 @@ static constexpr FeatureBitset ImpliedFeaturesRETPOLINE_INDIRECT_BRANCHES = {};
 static constexpr FeatureBitset ImpliedFeaturesRETPOLINE_INDIRECT_CALLS = {};
 static constexpr FeatureBitset ImpliedFeaturesLVI_CFI = {};
 static constexpr FeatureBitset ImpliedFeaturesLVI_LOAD_HARDENING = {};
-static constexpr FeatureBitset ImpliedFeaturesSESES = {};
 
 // XSAVE features are dependent on basic XSAVE.
 static constexpr FeatureBitset ImpliedFeaturesXSAVEC = FeatureXSAVE;
@@ -574,7 +573,6 @@ void llvm::X86::getImpliedFeatures(
   if (I == std::end(FeatureInfos)) {
     // FIXME: This shouldn't happen, but may not have all features in the table
     // yet.
-    assert(false && "Feature not found in table!");
     return;
   }