patch 9.0.0676: CI on Mac M1 with gcc actually uses clang

Problem:    CI on Mac M1 with gcc actually uses clang.
Solution:   Remove the gcc task. (Ozaki Kiichi, closes #11297)

src/version.c

@@ -699,6 +699,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    676,
 /**/
     675,
 /**/