chore: clean up unused badge and deprecated models (#76)

* chore: clean up unused badge and deprecated models

Signed-off-by: feng-tao <fengtao04@gmail.com>

* chore: update

Signed-off-by: feng-tao <fengtao04@gmail.com>

README.md

@@ -1,7 +1,5 @@
 # Amundsen Common
 [![PyPI version](https://badge.fury.io/py/amundsen-common.svg)](https://badge.fury.io/py/amundsen-common)
-[![Build Status](https://api.travis-ci.org/lyft/amundsencommon.svg?branch=master)](https://travis-ci.org/lyft/amundsencommon)
-[![Coverage Status](https://img.shields.io/codecov/c/github/lyft/amundsencommon/master.svg)](https://codecov.io/github/lyft/amundsencommon?branch=master)
 [![License](http://img.shields.io/:license-Apache%202-blue.svg)](LICENSE)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)
 [![Slack Status](https://img.shields.io/badge/slack-join_chat-white.svg?logo=slack&style=social)](https://amundsenworkspace.slack.com/join/shared_invite/enQtNTk2ODQ1NDU1NDI0LTc3MzQyZmM0ZGFjNzg5MzY1MzJlZTg4YjQ4YTU0ZmMxYWU2MmVlMzhhY2MzMTc1MDg0MzRjNTA4MzRkMGE0Nzk)

amundsen_common/models/table.py

@@ -59,26 +59,6 @@ class Meta:
         register_as_scheme = True
 
 
-@attr.s(auto_attribs=True, kw_only=True)
-class Statistics:
-    """
-    DEPRECATED. Use Stat
-    """
-    stat_type: str
-    stat_val: Optional[str] = None
-    start_epoch: Optional[int] = None
-    end_epoch: Optional[int] = None
-
-
-class StatisticsSchema(AttrsSchema):
-    """
-    DEPRECATED. Use StatSchema
-    """
-    class Meta:
-        target = Statistics
-        register_as_scheme = True
-
-
 @attr.s(auto_attribs=True, kw_only=True)
 class Stat:
     stat_type: str