backport: Remove spurious include that keeps hypermail from compiling under macos

jkbzh · jkbzh · commit 804cd1489e78 · 2022-04-06T11:13:28.000+02:00
diff --git a/src/file.c b/src/file.c
@@ -53,9 +53,6 @@
 #endif
 #endif /* HAVE_LIBFNV */
 
-extern int snprintf(char *str, size_t size, const  char  *format, ...);
-
-
 /*
 ** Does a file exist?
 */
