Bug 1262480 - Clean up getCurrentCensusTaker style; r=jimb

devtools/client/memory/actions/snapshot.js

@@ -291,12 +291,11 @@ const getCurrentCensusTaker = exports.getCurrentCensusTaker = function (currentV
   switch (currentView) {
     case viewState.TREE_MAP:
       return takeTreeMap;
-    break;
     case viewState.CENSUS:
       return takeCensus;
-    break;
-  }
+    default:
       return defaultCensusTaker;
+  }
 };
 
 /**