remove unneeded ifdefed code

Not actually going to fill this part in for scalars

Author: Greg Roth

tools/clang/test/CodeGenDXIL/hlsl/types/longvec-operators-scalars.hlsl

@@ -27,23 +27,6 @@ struct Interface {
   TYPE scales[10];
 };
 
-#if 0
-// Requires vector loading support. Enable when available.
-RWStructuredBuffer<Interface> Input;
-RWStructuredBuffer<Interface> Output;
-
-TYPE g_val;
-
-[shader("compute")]
-[numthreads(8,1,1)]
-void main(uint GI : SV_GroupIndex) {
-  assignments(Output[GI].assigned, Input[GI].scales);
-  Output[GI].arithmeticked = arithmetic(Input[GI].arithmeticked);
-  Output[GI].logicked = logic(Input[GI].logicked, Input[GI].assigned);
-  Output[GI].indexed = index(Input[GI].indexed, GI, g_val);
-}
-#endif
-
 // A mixed-type overload to test overload resolution and mingle different vector element types in ops
 // Test assignment operators.
 // CHECK-LABEL: define void @"\01?assignments