diff --git a/internal/internal.go b/internal/internal.go
index 995c5b6..1451e04 100644
--- a/internal/internal.go
+++ b/internal/internal.go
@@ -37,18 +37,3 @@
 	}
 	return lines, nil
 }
-
-// Cut cuts s around the first instance of sep,
-// returning the text before and after sep.
-// The found result reports whether sep appears in s.
-// If sep does not appear in s, cut returns s, "", false.
-//
-// https://golang.org/issue/46336 is an accepted proposal to add this to the
-// standard library. It will presumably land in Go 1.18, so this can be removed
-// when pkgsite moves to that version.
-func Cut(s, sep string) (before, after string, found bool) {
-	if i := strings.Index(s, sep); i >= 0 {
-		return s[:i], s[i+len(sep):], true
-	}
-	return s, "", false
-}
diff --git a/internal/report/ghsa.go b/internal/report/ghsa.go
index 8872e1d..8825529 100644
--- a/internal/report/ghsa.go
+++ b/internal/report/ghsa.go
@@ -8,7 +8,6 @@
 	"fmt"
 	"strings"
 
-	"golang.org/x/vulndb/internal"
 	"golang.org/x/vulndb/internal/ghsa"
 )
 
@@ -112,7 +111,7 @@
 		if p == "" {
 			continue
 		}
-		before, after, found := internal.Cut(p, " ")
+		before, after, found := strings.Cut(p, " ")
 		if !found {
 			return nil, fmt.Errorf("invalid vuln range item %q", p)
 		}