Revert "Merge pull request #1274 from greg-lunarg/legal2"

This reverts commit 2c65069ecd, reversing
changes made to fa9b465b92.

hlsl/hlslParseHelper.cpp

@@ -9885,12 +9885,10 @@ void HlslParseContext::finish()
     addPatchConstantInvocation();
     fixTextureShadowModes();
 
-#ifndef ENABLE_OPT
     // Communicate out (esp. for command line) that we formed AST that will make
     // illegal AST SPIR-V and it needs transforms to legalize it.
     if (intermediate.needsLegalization())
         infoSink.info << "WARNING: AST will form illegal SPIR-V; need to transform to legalize";
-#endif
 
     TParseContextBase::finish();
 }