eliminate code related to --no-ir-gen

src/IceGlobalContext.h

Index: src/IceGlobalContext.h
diff --git a/src/IceGlobalContext.h b/src/IceGlobalContext.h
index ec4e7174ea394b384f6dc6a02ffb1b57552b15f0..01724fb37dde02d908c9e512bba69653de868335 100644
--- a/src/IceGlobalContext.h
+++ b/src/IceGlobalContext.h
@@ -222,10 +222,6 @@ public:
 
   const ClFlags &getFlags() const { return Flags; }
 
-  bool isIRGenerationDisabled() const {
-    return getFlags().getDisableIRGeneration();
-  }
-
   /// Allocate data of type T using the global allocator. We allow entities
   /// allocated from this global allocator to be either trivially or
   /// non-trivially destructible. We optimize the case when T is trivially