--- a/configmix/__init__.py	Thu Sep 10 02:01:28 2020 +0200
+++ b/configmix/__init__.py	Thu Sep 10 09:22:30 2020 +0200
@@ -205,7 +205,7 @@
     "javascript": _load_json,
     "json": _load_json,
     "-*-ignore-*-": _load_ignore,
-    "-*- ignore -*-": _load_ignore,    
+    "-*- ignore -*-": _load_ignore,
 }
 """Default associations between file modes and loader functions"""
 
@@ -327,6 +327,23 @@
             _extensions.insert(0, (fnpattern, mode))
 
 
+def del_assoc(fnpattern):
+    """Remove all associations for `fnpattern`.
+
+    :param str fnpattern: the :mod:`fnmatch` pattern to associate a loader
+                          with
+
+    """
+    while True:
+        for i in range(len(_extensions)):
+            pat, fmode = _extensions[i]
+            if fnpattern == pat:
+                del _extensions[i]
+                break   # restart
+        else:
+            return      # nothing deleted -> done
+
+
 def _load_cfg_from_file(filename, ignore_unknown=False):
     """Determine the loader for file `filename` and return the loaded
     configuration dict.