[DBMON-6788] Remove duplicated tags logic from mysql (#24273)

* [DBMON-6788] Remove duplicated tags logic from mysql

Co-authored-by: Cursor <cursoragent@cursor.com>

* Add changelog

Co-authored-by: Cursor <cursoragent@cursor.com>

---------

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: eric-weaver

mysql/changelog.d/24273.fixed

@@ -0,0 +1 @@
+Remove duplicated tags logic now provided by the DatabaseCheck base class.

mysql/datadog_checks/mysql/mysql.py

@@ -19,7 +19,6 @@
 from datadog_checks.base.utils.db import QueryExecutor, QueryManager
 from datadog_checks.base.utils.db.health import HealthEvent, HealthStatus
 from datadog_checks.base.utils.db.utils import (
-    TagManager,
     default_json_event_encoding,
     tracked_query,
 )
@@ -127,7 +126,6 @@ def __init__(self, name, init_config, instances):
         self._replication_role = None
         self._initialized_at = int(time.time() * 1000)
         self._config = MySQLConfig(self.instance, init_config)
-        self.tag_manager = TagManager()
         self.tag_manager.set_tags_from_list(self._config.tags, replace=True)  # Initialize from static config tags
         self.add_core_tags()
         self._cloud_metadata = self._config.cloud_metadata
@@ -198,10 +196,6 @@ def _send_metadata(self):
         self.set_metadata('flavor', self.version.flavor)
         self.set_metadata('resolved_hostname', self.resolved_hostname)
 
-    @property
-    def tags(self):
-        return self.tag_manager.get_tags()
-
     @property
     def reported_hostname(self):
         # type: () -> str