[Typechecker] Don't use PropertyWrapperMutability for isSelfLValue check

Author: theblixguy

lib/Sema/TypeCheckStorage.cpp

@@ -765,14 +765,6 @@ static Expr *buildStorageReference(AccessorDecl *accessor,
   if (isMemberLValue)
     isSelfLValue |= storage->isSetterMutating();
 
-  // If we're accessing a property wrapper, determine if
-  // the self requires an lvalue.
-  if (auto mut = propertyWrapperMutability(storage)) {
-    isSelfLValue = mut->first;
-    if (isMemberLValue)
-      isSelfLValue |= mut->second;
-  }
-
   Expr *selfDRE =
     buildSelfReference(selfDecl, selfAccessKind, isSelfLValue,
                        ctx);