Remove rake task to refresh the foreign tables

Since Gitlab 13.2 Geo does not rely on the
Foreign Data Wrapper to replicate data.

ee/lib/tasks/geo.rake

@@ -50,18 +50,6 @@ namespace :geo do
       Gitlab::Geo::DatabaseTasks.load_seed
     end
 
-    desc 'GitLab | Geo | DB | Refresh Foreign Tables definition in Geo Secondary node'
-    task refresh_foreign_tables: [:environment] do
-      if Gitlab::Geo::GeoTasks.foreign_server_configured?
-        print "\nRefreshing foreign tables for FDW: #{Gitlab::Geo::Fdw::FOREIGN_SCHEMA} ... "
-        Gitlab::Geo::GeoTasks.refresh_foreign_tables!
-        puts 'Done!'
-      else
-        puts "Error: Cannot refresh foreign tables, there is no foreign server configured."
-        exit 1
-      end
-    end
-
     # IMPORTANT: This task won't dump the schema if ActiveRecord::Base.dump_schema_after_migration is set to false
     task _dump: [:environment] do
       if Gitlab::Geo::DatabaseTasks.dump_schema_after_migration?

ee/spec/tasks/geo_rake_spec.rb

@@ -29,8 +29,6 @@ RSpec.describe 'geo rake tasks', :geo do
 
   it 'Gitlab::Geo::GeoTasks responds to all methods used in Geo rake tasks' do
     %i[
-      foreign_server_configured?
-      refresh_foreign_tables!
       set_primary_geo_node
       update_primary_geo_node_url
     ].each do |method|
@@ -115,15 +113,6 @@ RSpec.describe 'geo rake tasks', :geo do
     end
   end
 
-  describe 'geo:db:refresh_foreign_tables' do
-    it 'refreshes foreign tables definition on secondary node' do
-      allow(Gitlab::Geo::GeoTasks).to receive(:foreign_server_configured?).and_return(true)
-      expect(Gitlab::Geo::GeoTasks).to receive(:refresh_foreign_tables!)
-
-      run_rake_task('geo:db:refresh_foreign_tables')
-    end
-  end
-
   describe 'geo:db:_dump' do
     it 'dumps the schema' do
       allow(Gitlab::Geo::DatabaseTasks).to receive(:dump_schema_after_migration?).and_return(true)
@@ -231,15 +220,6 @@ RSpec.describe 'geo rake tasks', :geo do
     end
   end
 
-  describe 'geo:db:test:refresh_foreign_tables' do
-    it 'refreshes foreign tables definitions in test environment' do
-      allow(ActiveRecord::Tasks::DatabaseTasks).to receive(:env)
-      expect(Rake::Task['geo:db:refresh_foreign_tables']).to receive(:invoke)
-
-      run_rake_task('geo:db:test:refresh_foreign_tables')
-    end
-  end
-
   describe 'geo:set_primary_node' do
     before do
       stub_config_setting(url: 'https://example.com:1234/relative_part')