Remove custom deployment watcher script

As of version 1.1.2 of Nomad, the CLI monitors job deployments by
default until they are finished. Thus our custom job deployment
watcher script is not required anymore.

.gitlab-ci.yml

@@ -153,7 +153,7 @@ test_e2e:
     - nomad validate deploy/api.nomad
     # nomad plan returns 1 if allocation is created or destroyed which is what we want here
     - nomad plan     deploy/api.nomad || [ $? == 1 ]
-    - nomad-run-and-wait deploy/api.nomad
+    - nomad run      deploy/api.nomad
   artifacts:
     paths:
       - deploy/api.nomad