[DBMON-6787] Remove duplicated agent_hostname logic from sqlserver (#24271)

* [DBMON-6787] Remove duplicated agent_hostname logic from sqlserver

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

sqlserver/changelog.d/24271.fixed

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

sqlserver/datadog_checks/sqlserver/sqlserver.py

@@ -146,7 +146,6 @@ def __init__(self, name, init_config, instances):
         )
 
         self._resolved_hostname = None
-        self._agent_hostname = None
         self._database_hostname = None
         self._database_identifier = None
         self._connection = None
@@ -504,13 +503,6 @@ def debug_stats_kwargs(self, tags=None):
             "raw": True,
         }
 
-    @property
-    def agent_hostname(self):
-        # type: () -> str
-        if self._agent_hostname is None:
-            self._agent_hostname = datadog_agent.get_hostname()
-        return self._agent_hostname
-
     @property
     def connection(self):
         if self._connection is None: