eliminate code related to --no-ir-gen

src/IceClFlags.cpp

Index: src/IceClFlags.cpp
diff --git a/src/IceClFlags.cpp b/src/IceClFlags.cpp
index b922d4000388748b1aa17f500811010cf3dafaac..d01b5489e78205de39633fd3a28257ca0f2834e4 100644
--- a/src/IceClFlags.cpp
+++ b/src/IceClFlags.cpp
@@ -457,7 +457,6 @@ void ClFlags::getParsedClFlags(ClFlags &OutFlags) {
   OutFlags.setDisableHybridAssembly(::DisableHybridAssembly ||
                                     (::OutFileType != Ice::FT_Iasm));
   OutFlags.setDisableInternal(::DisableInternal);
-  OutFlags.setDisableIRGeneration(::DisableIRGeneration);
   OutFlags.setDisableTranslation(::DisableTranslation);
   OutFlags.setDumpStats(::DumpStats);
   OutFlags.setEnableBlockProfile(::EnableBlockProfile);