diff --git a/internal/lsp/cache/workspace.go b/internal/lsp/cache/workspace.go
index 4d05adc..efaa38c 100644
--- a/internal/lsp/cache/workspace.go
+++ b/internal/lsp/cache/workspace.go
@@ -308,11 +308,6 @@
 	return filepath.Base(uri.Filename()) == "go.mod"
 }
 
-// isGoMod reports if uri is a go.sum file.
-func isGoSum(uri span.URI) bool {
-	return filepath.Base(uri.Filename()) == "go.sum"
-}
-
 // fileExists reports if the file uri exists within source.
 func fileExists(ctx context.Context, uri span.URI, source source.FileSource) (bool, error) {
 	fh, err := source.GetFile(ctx, uri)
diff --git a/internal/lsp/general.go b/internal/lsp/general.go
index 620140c..3b940b8 100644
--- a/internal/lsp/general.go
+++ b/internal/lsp/general.go
@@ -13,7 +13,6 @@
 	"os"
 	"path"
 	"path/filepath"
-	"strings"
 	"sync"
 
 	"golang.org/x/tools/internal/event"
@@ -409,11 +408,6 @@
 	return nil
 }
 
-func isSubdirectory(root, leaf string) bool {
-	rel, err := filepath.Rel(root, leaf)
-	return err == nil && !strings.HasPrefix(rel, "..")
-}
-
 func (s *Server) fetchConfig(ctx context.Context, name string, folder span.URI, o *source.Options) error {
 	if !s.session.Options().ConfigurationSupported {
 		return nil
diff --git a/internal/lsp/semantic.go b/internal/lsp/semantic.go
index b669fab..48700d2 100644
--- a/internal/lsp/semantic.go
+++ b/internal/lsp/semantic.go
@@ -126,8 +126,6 @@
 	tokOperator  tokenType = "operator"
 )
 
-var lastPosition token.Position
-
 func (e *encoded) token(start token.Pos, leng int, typ tokenType, mods []string) {
 	if start == 0 {
 		e.unexpected("token at token.NoPos")