removed unneeded parenthesis

lib/single-file/modules/css-rules-minifier.js

@@ -77,7 +77,7 @@ this.cssRulesMinifier = this.cssRulesMinifier || (() => {
 				} else if (ruleData.type == "Rule") {
 					const ruleInfo = mediaInfo.rules.get(ruleData);
 					const pseudoSelectors = mediaInfo.pseudoRules.get(ruleData);
-					if ((!ruleInfo && !pseudoSelectors)) {
+					if (!ruleInfo && !pseudoSelectors) {
 						removedCssRules.push(cssRule);
 					} else if (ruleInfo) {
 						processRuleInfo(ruleData, ruleInfo, pseudoSelectors);