locksettings: remove unused code to read/write LEGACY_LOCK_PATTERN_ENABLED

    private static final String TAG = "LockPatternUtils";

    private static final boolean FRP_CREDENTIAL_ENABLED = true;

    /**

     * The key to identify when the lock pattern enabled flag is being accessed for legacy reasons.

     */

    public static final String LEGACY_LOCK_PATTERN_ENABLED = "legacy_lock_pattern_enabled";

    /**

     * The interval of the countdown for showing progress of the lockout.

     */

        return type == CREDENTIAL_TYPE_PATTERN;

    }

    @Deprecated

    public boolean isLegacyLockPatternEnabled(int userId) {

        // Note: this value should default to {@code true} to avoid any reset that might result.

        // We must use a special key to read this value, since it will by default return the value

        // based on the new logic.

        return getBoolean(LEGACY_LOCK_PATTERN_ENABLED, true, userId);

    }

    @Deprecated

    public void setLegacyLockPatternEnabled(int userId) {

        setBoolean(Settings.Secure.LOCK_PATTERN_ENABLED, true, userId);

    }

    /**

     * @return Whether the visible pattern is enabled.

     */

        if (userId == USER_FRP) {

            return null;

        }

        if (LockPatternUtils.LEGACY_LOCK_PATTERN_ENABLED.equals(key)) {

            key = Settings.Secure.LOCK_PATTERN_ENABLED;

        }

        return readKeyValue(key, defaultValue, userId);

    }