Revert "[Strict memory safety] Squash warning about unsafety in "@objc enum" synthesized code"

This reverts commit fcd206f.

Author: hamishknight

lib/Sema/DerivedConformance/DerivedConformanceRawRepresentable.cpp

@@ -105,9 +105,7 @@ deriveBodyRawRepresentable_raw(AbstractFunctionDecl *toRawDecl, void *) {
 
     auto *argList = ArgumentList::forImplicitCallTo(functionRef->getName(),
                                                     {selfRef, typeExpr}, C);
-    Expr *call = CallExpr::createImplicit(C, functionRef, argList);
-    if (C.LangOpts.hasFeature(Feature::StrictMemorySafety))
-      call = UnsafeExpr::createImplicit(C, SourceLoc(), call);
+    auto call = CallExpr::createImplicit(C, functionRef, argList);
     auto *returnStmt = ReturnStmt::createImplicit(C, call);
     auto body = BraceStmt::create(C, SourceLoc(), ASTNode(returnStmt),
                                   SourceLoc());