@SuppressWarnings("RedundantCollectionOperation")
    public final void removeAppKey(final String appKey) {
        if (appKeys.contains(appKey)) {
            final int index = appKeys.indexOf(appKey);
            appKeys.remove(index);
            saveApplicationKeys();
        }
    }
Removes the specified app key from the app key

@param appKey App key to be removed
mesh/src/main/java/no/nordicsemi/android/mesh/ProvisioningSettings.java