Remove unused scopes in Account model (#35276)

spec/models/account_spec.rb

@@ -640,19 +640,6 @@ RSpec.describe Account do
       end
     end
 
-    describe 'alphabetic' do
-      it 'sorts by alphabetic order of domain and username' do
-        matches = [
-          { username: 'a', domain: 'a' },
-          { username: 'b', domain: 'a' },
-          { username: 'a', domain: 'b' },
-          { username: 'b', domain: 'b' },
-        ].map(&method(:Fabricate).curry(2).call(:account))
-
-        expect(described_class.without_internal.alphabetic).to eq matches
-      end
-    end
-
     describe 'matches_display_name' do
       it 'matches display name which starts with the given string' do
         match = Fabricate(:account, display_name: 'pattern and suffix')