diff --git a/internal/lsp/cache/graph.go b/internal/lsp/cache/graph.go
index ad39aa8d86..88c9f14719 100644
--- a/internal/lsp/cache/graph.go
+++ b/internal/lsp/cache/graph.go
@@ -158,18 +158,3 @@ func (g *metadataGraph) reverseTransitiveClosure(includeInvalid bool, ids ...Pac
 	visitAll(ids)
 	return seen
 }
-
-func collectReverseTransitiveClosure(g *metadataGraph, includeInvalid bool, ids []PackageID, seen map[PackageID]struct{}) {
-	for _, id := range ids {
-		if _, ok := seen[id]; ok {
-			continue
-		}
-		m := g.metadata[id]
-		// Only use invalid metadata if we support it.
-		if m == nil || !(m.Valid || includeInvalid) {
-			continue
-		}
-		seen[id] = struct{}{}
-		collectReverseTransitiveClosure(g, includeInvalid, g.importedBy[id], seen)
-	}
-}