diff --git a/build/ci.go b/build/ci.go
index 5126793c3d6..df2b973a3ad 100644
--- a/build/ci.go
+++ b/build/ci.go
@@ -343,10 +343,6 @@ func downloadSpecTestFixtures(csdb *download.ChecksumDB, cachedir string) string
 	return filepath.Join(cachedir, base)
 }
 
-// doCheckTidy assets that the Go modules files are tidied already.
-func doCheckTidy() {
-}
-
 // doCheckGenerate ensures that re-generating generated files does not cause
 // any mutations in the source file tree.
 func doCheckGenerate() {
diff --git a/internal/build/file.go b/internal/build/file.go
index 2d8c993f360..7490af281e2 100644
--- a/internal/build/file.go
+++ b/internal/build/file.go
@@ -34,23 +34,6 @@ func FileExist(path string) bool {
 	return true
 }
 
-// HashFiles iterates the provided set of files, computing the hash of each.
-func HashFiles(files []string) (map[string][32]byte, error) {
-	res := make(map[string][32]byte)
-	for _, filePath := range files {
-		f, err := os.OpenFile(filePath, os.O_RDONLY, 0666)
-		if err != nil {
-			return nil, err
-		}
-		hasher := sha256.New()
-		if _, err := io.Copy(hasher, f); err != nil {
-			return nil, err
-		}
-		res[filePath] = [32]byte(hasher.Sum(nil))
-	}
-	return res, nil
-}
-
 // HashFolder iterates all files under the given directory, computing the hash
 // of each.
 func HashFolder(folder string, exlude []string) (map[string][32]byte, error) {