diff --git a/src/regexp/onepass.go b/src/regexp/onepass.go
index 49919548201a66f9cc7af47bbc8279f14196c3f7..1b0564c3fd0c3481c78127542558e5979ec44a82 100644
--- a/src/regexp/onepass.go
+++ b/src/regexp/onepass.go
@@ -287,11 +287,6 @@ func (p runeSlice) Len() int           { return len(p) }
 func (p runeSlice) Less(i, j int) bool { return p[i] < p[j] }
 func (p runeSlice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
 
-// Sort is a convenience method.
-func (p runeSlice) Sort() {
-	sort.Sort(p)
-}
-
 var anyRuneNotNL = []rune{0, '\n' - 1, '\n' + 1, unicode.MaxRune}
 var anyRune = []rune{0, unicode.MaxRune}