Remove commented-out code

Cleaned up old bd-160 export hash tracking code that was disabled.
Removed unnecessary test comments.

Amp-Thread-ID: https://ampcode.com/threads/T-de38a626-a425-414f-92d8-102bc1519c8b
Co-authored-by: Amp <amp@ampcode.com>

internal/beads/beads_hash_multiclone_test.go

@@ -207,8 +207,6 @@ func setupClone(t *testing.T, tmpDir, remoteDir, name, bdPath string) string {
 		runCmd(t, cloneDir, bdCmd, "init", "--quiet", "--prefix", "test")
 	}
 	
-	// Skip git hooks installation in tests - not needed and slows things down
-	// installGitHooks(t, cloneDir)
 	return cloneDir
 }