turned out HasShaderDefine() landed in 2017_1 afterall

turned out HasShaderDefine() landed in 2017_1 afterall

Assets/ScriptableRenderPipeline/common/TextureCache.cs

                 var probeFormat = TextureFormat.BC6H;
 
                 // On editor the texture is uncompressed when operating against mobile build targets
-#if UNITY_2017_2_OR_NEWER
+//#if UNITY_2017_2_OR_NEWER
-#else
-                if (SystemInfo.SupportsTextureFormat(probeFormat) && !TextureCache.isMobileBuildTarget)
-                    format = probeFormat;
-#endif
+//#else
+//                if (SystemInfo.SupportsTextureFormat(probeFormat) && !TextureCache.isMobileBuildTarget)
+//                    format = probeFormat;
+//#endif
 
                 return format;
             }
         {
             get
             {
-#if UNITY_2017_2_OR_NEWER
+//#if UNITY_2017_2_OR_NEWER
-#else
-                return (SystemInfo.supportsCubemapArrayTextures && !TextureCache.isMobileBuildTarget);
-#endif
+//#else
+//                return (SystemInfo.supportsCubemapArrayTextures && !TextureCache.isMobileBuildTarget);
+//#endif
             }
         }