chore(Networks): remove unnecessary test delay

Remove the test delay used to fix the "Cannot Connect With The Server"
problem as the underlying issue is fixed by the introduction of separate
stubs for the Mesos `SUBSCRIBE` and `GET_MASTER` request.

tests/pages/networking/Networks-cy.js

@@ -73,11 +73,6 @@ describe("Networks", function() {
 
     it("allows users to filter the table", function() {
       cy
-        // Even though this is a anti pattern and almost always not needed
-        // Wait a bit so "Cannot Connect With The Server" isn't displayed
-        // 2 secs is based on the time "Cannot Connect With The Server" was displayed
-        // before the nodes table is displayed
-        .wait(2000)
         .get(".filter-bar-item .filter-input-text")
         .type("sleep.7084272b-6b76-11e5-a953-08002719334a");
       cy.get("tbody tr").should(function($tableRows) {