remove: gobot

Created by: IgnatovFedor

Removed configs

• gobot_dstc2_minimal
• gobot_md_yaml_minimal

Removed components

• dialog_component_wrapper
• featurized_tracker
• go_bot
• gobot_json_nlg_manager
• gobot_nlg_manager

Removed metrics

• per_item_action_accuracy

Removed modules

• deeppavlov.contrib
• deeppavlov.models.go_bot