Remove Geo::Fdw::Project model

ee/app/models/geo/fdw/project.rb

-# frozen_string_literal: true
-
-module Geo
-  module Fdw
-    class Project < ::Geo::BaseFdw
-      include Routable
-
-      self.primary_key = :id
-      self.table_name = Gitlab::Geo::Fdw.foreign_table_name('projects')
-
-      belongs_to :namespace, class_name: 'Geo::Fdw::Namespace'
-
-      alias_method :parent, :namespace
-
-      class << self
-        def within_namespaces(namespace_ids)
-          where(arel_table.name => { namespace_id: namespace_ids })
-        end
-
-        def within_shards(shard_names)
-          where(repository_storage: Array(shard_names))
-        end
-      end
-    end
-  end
-end