Watcher: Remove unneeded index deletion in tests

A leftover invalid TODO comment and `.watches` index deletion command
can be removed again.

Author: spinscale

x-pack/qa/smoke-test-watcher/src/test/java/org/elasticsearch/smoketest/SmokeTestWatcherTestSuiteIT.java

@@ -69,9 +69,6 @@ public void startWatcher() throws Exception {
                 assertThat(templateExistsResponse.getStatusLine().getStatusCode(), is(200));
             }
         });
-
-        // TODO why does the test fail without this? relaoding isseu with the new approach? Make sure to write a unit test!
-        assertOK(adminClient().performRequest("PUT", ".watches"));
     }
 
     @After