Deprecate meta_validate too.

jsonschema.py

@@ -684,5 +684,13 @@ def validate(instance, schema, cls=Draft3Validator, *args, **kwargs):
 
     """
 
+    meta_validate = kwargs.pop("meta_validate", None)
+    if meta_validate is not None:
+        warnings.warn(
+            "meta_validate is deprecated and will be removed. If you want to "
+            "validate a schema, use Draft3Validator.check_schema instead.",
+            DeprecationWarning, stacklevel=2,
+        )
+
     validator = cls(schema, *args, **kwargs)
     validator.validate(instance)

perftest

@@ -19,7 +19,7 @@ instance = schema = Draft3Validator.META_SCHEMA
 
 results = timeit.timeit(
     # Validate the Draft 3 meta-schema against itself without meta-validating
-    stmt="validate(instance, schema, meta_validate=False)",
+    stmt="validate(instance, schema)",
     setup="from __main__ import instance, schema, validate",
     number=arguments.number,
 )

tests.py

@@ -908,6 +908,14 @@ class TestValidator(TestCase):
             self.assertEqual(len(w), 1)
 
 
+class TestValidateFunction(TestCase):
+    def test_meta_validate_deprecated(self):
+        with warnings.catch_warnings(record=True) as w:
+            warnings.simplefilter("always")
+            validate("foo", {}, meta_validate=False)
+            self.assertEqual(len(w), 1)
+
+
 class TestValidatorIterErrors(TestIterErrors):
     def setUp(self):
         self.validator = Validator()