Revert kernel telemetry helper guard

Signed-off-by: Jay Xiao <jay.xiao@databricks.com>

Author: jay-xiao446

src/databricks/sql/telemetry/telemetry_client.py

@@ -122,9 +122,6 @@ def get_auth_flow(auth_provider):
 
     @staticmethod
     def is_telemetry_enabled(connection: "Connection") -> bool:
-        if getattr(connection.session, "use_kernel", False) is True:
-            return False
-
         # Fast path: force enabled - skip feature flag fetch entirely
         if connection.force_enable_telemetry:
             return True

tests/unit/test_telemetry.py

@@ -270,14 +270,6 @@ def test_token_federation_with_no_inner_provider(self):
         assert TelemetryHelper.get_auth_mechanism(fed) is None
         assert TelemetryHelper.get_auth_flow(fed) is None
 
-    def test_is_telemetry_enabled_returns_false_for_kernel(self):
-        connection = MagicMock()
-        connection.session.use_kernel = True
-        connection.force_enable_telemetry = True
-        connection.enable_telemetry = True
-
-        assert TelemetryHelper.is_telemetry_enabled(connection) is False
-
 
 class TestTelemetryFactory:
     """Tests for TelemetryClientFactory lifecycle and management."""