Revert "Tell `git revert` not to follow renames"

This doesn't work prior to git 2.8: `git revert` silently ignores the
option and succeeds. We will have to fix CVE-2016-10026 some other way.

This reverts commit 9cada49ed6.

IkiWiki/Plugin/git.pm

@@ -982,9 +982,7 @@ sub rcs_revert ($) {
 
 	ensure_committer();
 
-	if (run_or_non('git', 'revert', '--strategy=recursive',
-			'--strategy-option=no-renames',
-			'--no-commit', $sha1)) {
+	if (run_or_non('git', 'revert', '--no-commit', $sha1)) {
 		return undef;
 	}
 	else {