Remove reference to jsonschema.compat now removed upstream.

Signed-off-by: Ben Sturmfels <ben@sturm.com.au>

AUTHORS

@@ -82,6 +82,7 @@ Thank you!
 * Luke Slater
 * Manuel Urbano Santos
 * Marcel van der Boom
+* Marco Pessotto
 * Mark Holmquist
 * Mats Sjöberg
 * Matt Lee

docs/source/siteadmin/relnotes.rst

@@ -48,6 +48,7 @@ This chapter has important information about our current and previous releases.
 **Bug fixes:**
 
 - Fix test suite on Debian 11 (Ben Sturmfels)
+- Remove reference to jsonschema.compat no longer available upstream (Marco Pessotto)
 
 
 0.11.0

mediagoblin/tools/metadata.py

@@ -24,7 +24,6 @@ from pkg_resources import resource_filename
 import dateutil.parser
 from pyld import jsonld
 from jsonschema import validate, FormatChecker, draft4_format_checker
-from jsonschema.compat import str_types
 
 from mediagoblin.tools.pluginapi import hook_handle
 
@@ -42,7 +41,7 @@ def is_uri(instance):
     """
     jsonschema uri validator
     """
-    if not isinstance(instance, str_types):
+    if not isinstance(instance, str):
         return True
 
     return URL_REGEX.match(instance)
@@ -51,7 +50,7 @@ def is_datetime(instance):
     """
     Is a date or datetime readable string.
     """
-    if not isinstance(instance, str_types):
+    if not isinstance(instance, str):
         return True
 
     return dateutil.parser.parse(instance)