Cleanup original modifications to the exposed APIs

Signed-off-by: Nassim 'Nass' Eddequiouaq <eddequiouaq.nassim@gmail.com>

osxkeychain/osxkeychain_darwin_test.go

@@ -7,13 +7,11 @@ import (
 
 func TestOSXKeychainHelper(t *testing.T) {
 	creds := &credentials.Credentials{
-		Label:     credentials.CredsLabel,
 		ServerURL: "https://foobar.docker.io:2376/v1",
 		Username:  "foobar",
 		Secret:    "foobarbaz",
 	}
 	creds1 := &credentials.Credentials{
-		Label:     credentials.CredsLabel,
 		ServerURL: "https://foobar.docker.io:2376/v2",
 		Username:  "foobarbaz",
 		Secret:    "foobar",
@@ -36,14 +34,14 @@ func TestOSXKeychainHelper(t *testing.T) {
 		t.Fatalf("expected %s, got %s\n", "foobarbaz", secret)
 	}
 
-	auths, err := helper.List(credentials.CredsLabel)
+	auths, err := helper.List()
 	if err != nil || len(auths) == 0 {
 		t.Fatal(err)
 	}
 
 	helper.Add(creds1)
 	defer helper.Delete(creds1.ServerURL)
-	newauths, err := helper.List(credentials.CredsLabel)
+	newauths, err := helper.List()
 	if len(newauths)-len(auths) != 1 {
 		if err == nil {
 			t.Fatalf("Error: len(newauths): %d, len(auths): %d", len(newauths), len(auths))