diff --git a/django/middleware/common.py b/django/middleware/common.py
index ccc9fbfaad..c6e71e0d48 100644
--- a/django/middleware/common.py
+++ b/django/middleware/common.py
@@ -143,20 +143,6 @@ def _is_ignorable_404(uri):
     """
     Returns True if a 404 at the given URL *shouldn't* notify the site managers.
     """
-    if getattr(settings, 'IGNORABLE_404_STARTS', ()):
-        import warnings
-        warnings.warn('The IGNORABLE_404_STARTS setting has been deprecated '
-                      'in favor of IGNORABLE_404_URLS.', DeprecationWarning)
-        for start in settings.IGNORABLE_404_STARTS:
-            if uri.startswith(start):
-                return True
-    if getattr(settings, 'IGNORABLE_404_ENDS', ()):
-        import warnings
-        warnings.warn('The IGNORABLE_404_ENDS setting has been deprecated '
-                      'in favor of IGNORABLE_404_URLS.', DeprecationWarning)
-        for end in settings.IGNORABLE_404_ENDS:
-            if uri.endswith(end):
-                return True
     return any(pattern.search(uri) for pattern in settings.IGNORABLE_404_URLS)
 
 def _is_internal_request(domain, referer):
diff --git a/docs/howto/error-reporting.txt b/docs/howto/error-reporting.txt
index 5fbe5eda59..b4ced5a1b6 100644
--- a/docs/howto/error-reporting.txt
+++ b/docs/howto/error-reporting.txt
@@ -101,14 +101,6 @@ The best way to disable this behavior is to set
    records are ignored, but you can use them for error reporting by writing a
    handler and :doc:`configuring logging </topics/logging>` appropriately.
 
-.. seealso::
-
-   .. versionchanged:: 1.4
-
-   Previously, two settings were used to control which URLs not to report:
-   :setting:`IGNORABLE_404_STARTS` and :setting:`IGNORABLE_404_ENDS`. They
-   were replaced by :setting:`IGNORABLE_404_URLS`.
-
 .. _filtering-error-reports:
 
 Filtering error reports
diff --git a/docs/ref/settings.txt b/docs/ref/settings.txt
index bcc2a461c7..df679e7c1f 100644
--- a/docs/ref/settings.txt
+++ b/docs/ref/settings.txt
@@ -2244,22 +2244,6 @@ Default: Not defined
 The site-specific user profile model used by this site. See
 :ref:`User profiles <auth-profiles>`.
 
-.. setting:: IGNORABLE_404_ENDS
-
-IGNORABLE_404_ENDS
-------------------
-
-.. deprecated:: 1.4
-   This setting has been superseded by :setting:`IGNORABLE_404_URLS`.
-
-.. setting:: IGNORABLE_404_STARTS
-
-IGNORABLE_404_STARTS
---------------------
-
-.. deprecated:: 1.4
-   This setting has been superseded by :setting:`IGNORABLE_404_URLS`.
-
 .. setting:: URL_VALIDATOR_USER_AGENT
 
 URL_VALIDATOR_USER_AGENT