Remove the special case in the getThirdPartyAssetURL method for Mat…

…hQuill.

That special handling is no longer needed now that MathQuill is
installed via npm from the npm repositories.  Furthermore, jsdelivr
provides the files from the package that can be used when the
`$options{thirdPartyAssetsUseCDN}` option is set to 1.

lib/WeBWorK/Utils.pm

@@ -401,13 +401,13 @@ sub readJSON ($fileName) {
 sub getThirdPartyAssetURL ($file, $dependencies, $baseURL, $useCDN = 0) {
 	for (keys %$dependencies) {
 		if ($file =~ /^node_modules\/$_\/(.*)$/) {
-			if ($useCDN && $1 !~ /mathquill/) {
+			if ($useCDN) {
 				return
 					"https://cdn.jsdelivr.net/npm/$_\@"
 					. substr($dependencies->{$_}, 1) . '/'
 					. ($1 =~ s/(?:\.min)?\.(js|css)$/.min.$1/gr);
 			} else {
-				return "$baseURL/$file?version=" . ($dependencies->{$_} =~ s/#/@/gr);
+				return "$baseURL/$file?version=$dependencies->{$_}";
 			}
 		}
 	}