Merge remote-tracking branch 'origin/v4' into v4

lib/network/modules/InteractionHandler.js

@@ -257,7 +257,6 @@ class InteractionHandler {
             yFixed: object.options.fixed.y
           };
 
-          object.options.fixed = {};
           object.options.fixed.x = true;
           object.options.fixed.y = true;
 

lib/network/modules/components/Node.js

@@ -195,10 +195,6 @@ class Node {
         }
       }
     }
-    else if (allowDeletion === true) {
-      parentOptions.fixed = undefined;
-      delete parentOptions.fixed;
-    }
   }
 
   updateLabelModule() {