OP#186 remove local remote write

templates/prometheus.yml.erb

@@ -31,8 +31,8 @@ scrape_configs:
   basic_auth:
     username: <%= @ps_auth_user %>
     password: <%= @ps_auth_pass %>
+remote_write:
 <% if @ps_write_external == true -%>
-    remote_write:
   - url: "<%= @ps_external_url %>"
     basic_auth:
       username: <%= @ps_auth_ext_user %>