Remove check for gitlab employee badge feature

The `#gitlab_employee?` method would return false if the
Feature flag `gitlab_employee_badge` was enabled. Since this feature
flag only added a special badge to gitlab employees and didn't affect
the actual check, we're removing it. It was actually harming spam checks
which will allow issue creation without checking for spam if the user is
a gitlab employee. Since this feature flag is disabled, it always
failed.

ee/app/models/ee/user.rb

@@ -343,7 +343,7 @@ module EE
 
     def gitlab_employee?
       strong_memoize(:gitlab_employee) do
-        ::Gitlab.com? && ::Feature.enabled?(:gitlab_employee_badge) && gitlab_team_member?
+        ::Gitlab.com? && gitlab_team_member?
       end
     end
 

ee/spec/models/ee/user_spec.rb

@@ -1467,18 +1467,6 @@ RSpec.describe User do
         it { is_expected.to be false }
       end
     end
-
-    context 'when `:gitlab_employee_badge` feature flag is disabled' do
-      let(:user) { create(:user) }
-
-      before do
-        allow(Gitlab).to receive(:com?).and_return(true)
-        stub_feature_flags(gitlab_employee_badge: false)
-        gitlab_group.add_user(user, Gitlab::Access::DEVELOPER)
-      end
-
-      it { is_expected.to be false }
-    end
   end
 
   describe '#gitlab_bot?' do