[fenix] For https://github.com/mozilla-mobile/fenix/issues/21078 - Remove unused creditCardsFeature feature flag

app/src/main/java/org/mozilla/fenix/FeatureFlags.kt

@@ -19,11 +19,6 @@ object FeatureFlags {
      */
     val addressesFeature = Config.channel.isNightlyOrDebug
 
-    /**
-     * Enables the Credit Cards autofill feature.
-     */
-    const val creditCardsFeature = true
-
     /**
      * Enables WebAuthn support.
      */

app/src/main/java/org/mozilla/fenix/settings/SettingsFragment.kt

@@ -36,7 +36,6 @@ import mozilla.components.concept.sync.Profile
 import mozilla.components.support.ktx.android.view.showKeyboard
 import org.mozilla.fenix.BrowserDirection
 import org.mozilla.fenix.Config
-import org.mozilla.fenix.FeatureFlags
 import org.mozilla.fenix.HomeActivity
 import org.mozilla.fenix.R
 import org.mozilla.fenix.components.metrics.Event
@@ -451,9 +450,6 @@ class SettingsFragment : PreferenceFragmentCompat() {
         preferenceSyncOverride?.onPreferenceChangeListener = syncFxAOverrideUpdater
 
         with(requireContext().settings()) {
-            findPreference<Preference>(
-                getPreferenceKey(R.string.pref_key_credit_cards)
-            )?.isVisible = FeatureFlags.creditCardsFeature
             findPreference<Preference>(
                 getPreferenceKey(R.string.pref_key_nimbus_experiments)
             )?.isVisible = showSecretDebugMenuThisSession

app/src/main/java/org/mozilla/fenix/settings/account/AccountSettingsFragment.kt

@@ -300,7 +300,6 @@ class AccountSettingsFragment : PreferenceFragmentCompat() {
             isChecked = syncEnginesStatus.getOrElse(SyncEngine.Bookmarks) { true }
         }
         requirePreference<CheckBoxPreference>(R.string.pref_key_sync_credit_cards).apply {
-            isVisible = FeatureFlags.creditCardsFeature
             isEnabled = syncEnginesStatus.containsKey(SyncEngine.CreditCards)
             isChecked = syncEnginesStatus.getOrElse(SyncEngine.CreditCards) { true }
         }