Remove C++ comment.
diff --git a/Modules/unicodedata.c b/Modules/unicodedata.c
index 71fdcb0..e8f9c19 100644
--- a/Modules/unicodedata.c
+++ b/Modules/unicodedata.c
@@ -431,7 +431,7 @@
               skipped[index] = skipped[cskipped-1];
               cskipped--;
               i++;
-              goto again; // continue while
+              goto again; /* continue while */
           }
       }
       /* Hangul Composition. We don't need to check for <LV,T>