Remove Boards::BaseService

app/services/boards/base_service.rb

app/services/boards/create_service.rb

app/services/boards/issues/create_service.rb

app/services/boards/issues/list_service.rb

app/services/boards/issues/move_service.rb

app/services/boards/list_service.rb

app/services/boards/lists/create_service.rb

app/services/boards/lists/destroy_service.rb

app/services/boards/lists/generate_service.rb

app/services/boards/lists/list_service.rb

app/services/boards/lists/move_service.rb