fix compiling

Author: wsxiaoys

ggml-metal.m

@@ -128,7 +128,7 @@
 // MSL code
 // TODO: move the contents here when ready
 //       for now it is easier to work in a separate file
-static NSString * const msl_library_source = @"see metal.metal";
+// static NSString * const msl_library_source = @"see metal.metal";
 
 // Here to assist with NSBundle Path Hack
 @interface GGMLMetalClass : NSObject
@@ -247,6 +247,7 @@ static void ggml_metal_log(enum ggml_log_level level, const char* format, ...){
             return NULL;
         }
     }
+#endif
 
     // load kernels
     {