Merge pull request #7844 from slavapestov/one-last-cleanup

SILOptimizer: Use the SubstitutionMap form of substGenericArgs()
diff --git a/lib/SILOptimizer/Utils/Generics.cpp b/lib/SILOptimizer/Utils/Generics.cpp
index 3c12577..2adfd48 100644
--- a/lib/SILOptimizer/Utils/Generics.cpp
+++ b/lib/SILOptimizer/Utils/Generics.cpp
@@ -213,9 +213,7 @@
   auto OrigFnTy = OrigF->getLoweredFunctionType();
 
   // First substitute concrete types into the existing function type.
-  auto FnTy = OrigFnTy->substGenericArgs(
-      M, QuerySubstitutionMap{SubstMap},
-        LookUpConformanceInSubstitutionMap(SubstMap));
+  auto FnTy = OrigFnTy->substGenericArgs(M, SubstMap);
 
   if ((SpecializedGenericSig &&
        SpecializedGenericSig->areAllParamsConcrete()) ||