Remove users#show.json completely

See also the previous merge request 48712:
7https://gitlab.com/gitlab-org/gitlab/-/merge_requests/48712Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

app/controllers/users_controller.rb

@@ -33,10 +33,8 @@ class UsersController < ApplicationController
       end
 
       format.json do
-        # In 13.8, this endpoint will be removed:
-        # https://gitlab.com/gitlab-org/gitlab/-/issues/289972
-        load_events
-        pager_json("events/_events", @events.count, events: @events)
+        msg = "This endpoint is deprecated. Use %s instead." % user_activity_path
+        render json: { message: msg }, status: :not_found
       end
     end
   end

changelogs/unreleased/289972-remove-users-show-json-completely.yml

+---
+title: Remove users#show.json completely
+merge_request: 49670
+author: Takuya Noguchi
+type: other

spec/requests/users_controller_spec.rb

@@ -76,7 +76,7 @@ RSpec.describe UsersController do
       end
     end
 
-    context 'json with events' do
+    context 'requested in json format' do
       let(:project) { create(:project) }
 
       before do
@@ -86,31 +86,13 @@ RSpec.describe UsersController do
         sign_in(user)
       end
 
-      it 'loads events' do
+      it 'returns 404 with deprecation message' do
         # Requesting "/username?format=json" instead of "/username.json"
         get user_url user.username, params: { format: :json }
 
+        expect(response).to have_gitlab_http_status(:not_found)
         expect(response.media_type).to eq('application/json')
-        expect(Gitlab::Json.parse(response.body)['count']).to eq(1)
-      end
-
-      it 'hides events if the user cannot read cross project' do
-        allow(Ability).to receive(:allowed?).and_call_original
-        expect(Ability).to receive(:allowed?).with(user, :read_cross_project) { false }
-
-        get user_url user.username, params: { format: :json }
-
-        expect(response.media_type).to eq('application/json')
-        expect(Gitlab::Json.parse(response.body)['count']).to eq(0)
-      end
-
-      it 'hides events if the user has a private profile' do
-        Gitlab::DataBuilder::Push.build_sample(project, private_user)
-
-        get user_url private_user.username, params: { format: :json }
-
-        expect(response.media_type).to eq('application/json')
-        expect(Gitlab::Json.parse(response.body)['count']).to eq(0)
+        expect(Gitlab::Json.parse(response.body)['message']).to include('This endpoint is deprecated.')
       end
     end
   end
@@ -183,7 +165,7 @@ RSpec.describe UsersController do
       end
     end
 
-    context 'json with events' do
+    context 'requested in json format' do
       let(:project) { create(:project) }
 
       before do