Remove deprecated angular panels docker mixin (#1125)

* Remove deprecated angular panels docker mixin

* Remove status panels from jsonnet libs mixin; Fix lint errors

* Keep file name same to ensure uid generated based on filenames stay same

Author: Muhammad Shahzeb

docker-mixin/dashboards/dashboards.libsonnet

@@ -1,2 +1,6 @@
-(import 'docker.libsonnet') +
+{
+  grafanaDashboards: {
+    'docker.json': (import 'docker-overview.json'),
+  },
+} +
 (import 'docker-logs.libsonnet')