diff --git a/brag/rules/runtime.rkt b/brag/rules/runtime.rkt
deleted file mode 100755
index e34df13..0000000
--- a/brag/rules/runtime.rkt
+++ /dev/null
@@ -1,34 +0,0 @@
-#lang racket/base
-(require br-parser-tools/lex)
-
-(provide (all-defined-out))
-
-;; During parsing, we should define the source of the input.
-(define current-source (make-parameter #f))
-
-
-;; When bad things happen, we need to emit errors with source location.
-(struct exn:fail:parse-grammar exn:fail (srclocs)
-        #:transparent
-        #:property prop:exn:srclocs (lambda (instance)
-                                      (exn:fail:parse-grammar-srclocs instance)))
-
-(define current-parser-error-handler
-  (make-parameter
-   (lambda (tok-ok? tok-name tok-value start-pos end-pos)
-     (raise (exn:fail:parse-grammar
-             (format "Error while parsing grammar near: ~e [line=~a, column~a, position=~a]"
-                     tok-value
-                     (position-line start-pos)
-                     (position-col start-pos)
-                     (position-offset start-pos))
-             (current-continuation-marks)
-             (list (srcloc (current-source)
-                           (position-line start-pos)
-                           (position-col start-pos)
-                           (position-offset start-pos)
-                           (if (and (number? (position-offset end-pos))
-                                    (number? (position-offset start-pos)))
-                               (- (position-offset end-pos)
-                                  (position-offset start-pos))
-                               #f))))))))