diff --git a/internal/client/client.go b/internal/client/client.go
index 58c915d..f49fac3 100644
--- a/internal/client/client.go
+++ b/internal/client/client.go
@@ -65,8 +65,6 @@
 	// It can be used by tools that periodically check for vulnerabilities
 	// to avoid repeating work.
 	LastModifiedTime(context.Context) (time.Time, error)
-
-	unexported() // ensures that adding a method won't break users
 }
 
 func getByIDs(ctx context.Context, client Client, ids []string) ([]*osv.Entry, error) {
diff --git a/internal/client/file.go b/internal/client/file.go
index 32a97fc..4988106 100644
--- a/internal/client/file.go
+++ b/internal/client/file.go
@@ -38,8 +38,6 @@
 	return &localSource{dir: dir}, nil
 }
 
-func (*localSource) unexported() {}
-
 func (ls *localSource) GetByModule(ctx context.Context, modulePath string) (_ []*osv.Entry, err error) {
 	defer derrors.Wrap(&err, "localSource.GetByModule(%q)", modulePath)
 
diff --git a/internal/client/http.go b/internal/client/http.go
index 80130ff..34fd2ed 100644
--- a/internal/client/http.go
+++ b/internal/client/http.go
@@ -113,8 +113,6 @@
 	return index, nil
 }
 
-func (*httpSource) unexported() {}
-
 func (hs *httpSource) GetByModule(ctx context.Context, modulePath string) (_ []*osv.Entry, err error) {
 	defer derrors.Wrap(&err, "httpSource.GetByModule(%q)", modulePath)