revert r92749, which is just dead code.

llvm-svn: 93074

clang/lib/CodeGen/CodeGenModule.cpp

@@ -466,16 +466,6 @@ void CodeGenModule::EmitDeferred() {
     if (!CGRef->isDeclaration())
       continue;
 
-    // Skip available externally functions at -O0
-    // FIXME: these aren't instantiated yet, so we can't yet do this.
-    if (0 && getCodeGenOpts().OptimizationLevel == 0)
-      if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D.getDecl())) {
-        GVALinkage Linkage = GetLinkageForFunction(getContext(), FD, Features);
-
-        if (Linkage == GVA_C99Inline)
-          continue;
-      }
-
     // Otherwise, emit the definition and move on to the next one.
     EmitGlobalDefinition(D);
   }