Index: applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/TemplatedTMSTileSource.java
===================================================================
--- applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/TemplatedTMSTileSource.java	(revision 35911)
+++ applications/viewer/jmapviewer/src/org/openstreetmap/gui/jmapviewer/tilesources/TemplatedTMSTileSource.java	(revision 35912)
@@ -1,3 +1,3 @@
-// License: GPL. For details, see Readme.txt file.
+ // License: GPL. For details, see Readme.txt file.
 package org.openstreetmap.gui.jmapviewer.tilesources;
 
@@ -54,10 +54,4 @@
     private static final Pattern PATTERN_PARAM  = Pattern.compile("\\{((?:\\d+-)?z(?:oom)?(:?[+-]\\d+)?|x|y|!y|-y|switch:([^}]+))\\}");
 
-    /**
-     * Pattern used only for compatibility with older JOSM clients. To remove end of 2020, with an update of JOSM wiki
-     * @deprecated to remove end of 2020
-     */
-    @Deprecated
-    private static final Pattern PATTERN_API_KEY_COMPATIBILITY = Pattern.compile("_apiKey_");
     // CHECKSTYLE.ON: SingleSpaceSeparator
 
@@ -111,5 +105,5 @@
                     throw new IllegalArgumentException(e);
                 }
-            }, PATTERN_API_KEY, PATTERN_API_KEY_COMPATIBILITY);
+            }, PATTERN_API_KEY);
         }
         // Capturing group pattern on zoom values