ui-shared: remove toggle_ssdiff arg to cgit_commit_link()

This argument is never used with a value other than zero, so remove it
and simplify the code.

Signed-off-by: John Keeping <john@keeping.me.uk>

ui-commit.c

@@ -67,7 +67,7 @@ void cgit_print_commit(char *hex, const char *prefix)
 	html("</td></tr>\n");
 	html("<tr><th>commit</th><td colspan='2' class='sha1'>");
 	tmp = sha1_to_hex(commit->object.sha1);
-	cgit_commit_link(tmp, NULL, NULL, ctx.qry.head, tmp, prefix, 0);
+	cgit_commit_link(tmp, NULL, NULL, ctx.qry.head, tmp, prefix);
 	html(" (");
 	cgit_patch_link("patch", NULL, NULL, NULL, tmp, prefix);
 	html(")</td></tr>\n");
@@ -96,7 +96,7 @@ void cgit_print_commit(char *hex, const char *prefix)
 			parent_info = cgit_parse_commit(parent);
 			tmp2 = parent_info->subject;
 		}
-		cgit_commit_link(tmp2, NULL, NULL, ctx.qry.head, tmp, prefix, 0);
+		cgit_commit_link(tmp2, NULL, NULL, ctx.qry.head, tmp, prefix);
 		html(" (");
 		cgit_diff_link("diff", NULL, NULL, ctx.qry.head, hex,
 			       sha1_to_hex(p->item->object.sha1), prefix, 0);