diff --git a/application/themehandler.class.inc.php b/application/themehandler.class.inc.php
index a9d0887ea..933e736c5 100644
--- a/application/themehandler.class.inc.php
+++ b/application/themehandler.class.inc.php
@@ -55,18 +55,6 @@ class ThemeHandler
 		];
 	}
 
-	/**
-	 * Return the ID of the theme currently defined in the config. file
-	 *
-	 * @deprecated 3.0.0, will be removed in 3.1, see N°3898
-	 * @return string
-	 */
-	public static function GetCurrentThemeId()
-	{
-		DeprecatedCallsLog::NotifyDeprecatedPhpMethod();
-		static::GetCurrentUserThemeId();
-	}
-
 	/**
 	 * @return string ID of the theme currently defined in the config. file, which applies to all users by default. If non defined, fallback on the default one.
 	 * @since 3.0.0