Use skstd::remove_pointer_t in GrGLFunction

include/gpu/gl/GrGLFunctions.h

Index: include/gpu/gl/GrGLFunctions.h
diff --git a/include/gpu/gl/GrGLFunctions.h b/include/gpu/gl/GrGLFunctions.h
index 4d0d6540cdac778ca32835001603c2fdec4dde6d..6986f8cc03f96c979389404f213627547a1ea7a3 100644
--- a/include/gpu/gl/GrGLFunctions.h
+++ b/include/gpu/gl/GrGLFunctions.h
@@ -354,7 +354,6 @@ typedef GrEGLImage (GR_GL_FUNCTION_TYPE* GrEGLCreateImageProc)(GrEGLDisplay dpy,
 typedef GrEGLBoolean (GR_GL_FUNCTION_TYPE* GrEGLDestroyImageProc)(GrEGLDisplay dpy, GrEGLImage image);
 }  // extern "C"
 
-template <typename GLPTR> using GrGLFunction =
-    std::function<typename std::remove_pointer<GLPTR>::type>;
+template <typename GLPTR> using GrGLFunction = std::function<skstd::remove_pointer_t<GLPTR>>;
 
 #endif