lib/css-analyzer.js: remove unneccesary check

Author: macbre

lib/css-analyzer.js

@@ -160,10 +160,6 @@ class CSSAnalyzer {
         //  "declarations":[{"type":"declaration","property":"border","value":"0"},{"type":"declaration","property":"background","value":"none"}]
         // }
         case "rule":
-          if (!rule.selectors || !rule.declarations) {
-            return;
-          }
-
           this.emit("rule", rule);
 
           // analyze each selector and declaration