diff --git a/core/modules/filterrunprefixes/apply.js b/core/modules/filterrunprefixes/apply.js
deleted file mode 100644
index 42389947f..000000000
--- a/core/modules/filterrunprefixes/apply.js
+++ /dev/null
@@ -1,24 +0,0 @@
-/*\
-title: $:/core/modules/filterrunprefixes/apply.js
-type: application/javascript
-module-type: filterrunprefix
-
-Filter run prefix to make input titles available as variables when evaluating the filter run
-
-\*/
-
-"use strict";
-
-exports.apply = function(operationSubFunction) {
-	return function(results,source,widget) {
-		source = widget.wiki.makeTiddlerIterator([]);
-		var variables = {},
-			counter = 1;
-		results.each(function(title) {
-			variables["$" + counter] = title;
-			counter++;
-		});
-		results.clear();
-		results.pushTop(operationSubFunction(source,widget.makeFakeWidgetWithVariables(variables)));
-	};
-};