Removed unnecessary check since querySelectorAll always returns a NodeList

lib/js/segmented-controllers.js

@@ -38,10 +38,8 @@
 
     activeBodies = targetBody.parentNode.querySelectorAll(classSelector);
 
-    if (activeBodies) {
-      for (var i = 0; i < activeBodies.length; i++){
-        activeBodies[i].classList.remove(className);
-      }
+    for (var i = 0; i < activeBodies.length; i++){
+      activeBodies[i].classList.remove(className);
     }
 
     targetBody.classList.add(className);