Remove explicit Gitlab::Metrics.action assignments, are already automatic.

CHANGELOG

@@ -126,6 +126,7 @@ v 8.9.0 (unreleased)
   - Various associations are now eager loaded when parsing issue references to reduce the number of queries executed
   - Set inverse_of for Project/Service association to reduce the number of queries
   - Update tanuki logo highlight/loading colors
+  - Remove explicit Gitlab::Metrics.action assignments, are already automatic.
   - Use Git cached counters for branches and tags on project page
   - Filter parameters for request_uri value on instrumented transactions.
   - Cache user todo counts from TodoService

lib/api/internal.rb

@@ -23,8 +23,6 @@ module API
       end
 
       post "/allowed" do
-        Gitlab::Metrics.action = 'Grape#/internal/allowed'
-
         status 200
 
         actor =