Use `expect(subject)` rather than `is_expected`

spec/lib/gitlab/middleware/readonly_geo_spec.rb

@@ -49,21 +49,21 @@ describe Gitlab::Middleware::ReadonlyGeo do
       response = request.patch('/test_request')
 
       expect(response).to be_a_redirect
-      is_expected.to disallow_request
+      expect(subject).to disallow_request
     end
 
     it 'expects PUT requests to be disallowed' do
       response = request.put('/test_request')
 
       expect(response).to be_a_redirect
-      is_expected.to disallow_request
+      expect(subject).to disallow_request
     end
 
     it 'expects POST requests to be disallowed' do
       response = request.post('/test_request')
 
       expect(response).to be_a_redirect
-      is_expected.to disallow_request
+      expect(subject).to disallow_request
     end
 
     it 'expects a internal POST request to be allowed after a disallowed request' do
@@ -80,7 +80,7 @@ describe Gitlab::Middleware::ReadonlyGeo do
       response = request.delete('/test_request')
 
       expect(response).to be_a_redirect
-      is_expected.to disallow_request
+      expect(subject).to disallow_request
     end
 
     context 'whitelisted requests' do
@@ -88,28 +88,28 @@ describe Gitlab::Middleware::ReadonlyGeo do
         response = request.delete('/users/sign_out')
 
         expect(response).not_to be_a_redirect
-        is_expected.not_to disallow_request
+        expect(subject).not_to disallow_request
       end
 
       it 'expects a POST internal request to be allowed' do
         response = request.post("/api/#{API::API.version}/internal")
 
         expect(response).not_to be_a_redirect
-        is_expected.not_to disallow_request
+        expect(subject).not_to disallow_request
       end
 
       it 'expects a GET status request to be allowed' do
         response = request.get("/api/#{API::API.version}/geo/status")
 
         expect(response).not_to be_a_redirect
-        is_expected.not_to disallow_request
+        expect(subject).not_to disallow_request
       end
 
       it 'expects a POST LFS request to batch URL to be allowed' do
         response = request.post('/root/rouge.git/info/lfs/objects/batch')
 
         expect(response).not_to be_a_redirect
-        is_expected.not_to disallow_request
+        expect(subject).not_to disallow_request
       end
     end
   end