Refs #24154 -- Removed deprecated BaseDatabaseOperations.check_aggregate_support().

django/db/backends/base/operations.py

 import datetime
 import decimal
-import warnings
 from importlib import import_module
 
 from django.conf import settings
@@ -8,7 +7,6 @@ from django.core.exceptions import ImproperlyConfigured
 from django.db.backends import utils
 from django.utils import six, timezone
 from django.utils.dateparse import parse_duration
-from django.utils.deprecation import RemovedInDjango20Warning
 from django.utils.encoding import force_text
 
 
@@ -556,13 +554,6 @@ class BaseDatabaseOperations(object):
             value = parse_duration(value)
         return value
 
-    def check_aggregate_support(self, aggregate_func):
-        warnings.warn(
-            "check_aggregate_support has been deprecated. Use "
-            "check_expression_support instead.",
-            RemovedInDjango20Warning, stacklevel=2)
-        return self.check_expression_support(aggregate_func)
-
     def check_expression_support(self, expression):
         """
         Check that the backend supports the provided expression.

docs/releases/2.0.txt

@@ -236,3 +236,6 @@ these features.
 
 * The ``weak`` argument to ``django.dispatch.signals.Signal.disconnect()`` is
   removed.
+
+* ``django.db.backends.base.BaseDatabaseOperations.check_aggregate_support()``
+  is removed.