Remove useless button in proxiwash modal

locales/en.json

@@ -70,7 +70,6 @@
       "modal": {
         "enableNotifications": "Notify me",
         "disableNotifications": "Stop notifications",
-        "ok": "OK",
         "cancel": "Cancel",
         "finished": "This machine is finished. If you started it, you can get back your laundry.",
         "ready": "This machine is empty and ready to use.",

locales/fr.json

@@ -70,7 +70,6 @@
       "modal": {
         "enableNotifications": "Me Notifier",
         "disableNotifications": "Désactiver les  notifications",
-        "ok": "OK",
         "cancel": "Annuler",
         "finished": "Cette machine est terminée. Si tu l'as démarrée, tu peux récupérer ton linge.",
         "ready": "Cette machine est vide et prête à être utilisée.",

src/screens/Proxiwash/ProxiwashScreen.tsx

@@ -200,11 +200,7 @@ class ProxiwashScreen extends React.Component<PropsType, StateType> {
    */
   getModalContent(title: string, item: ProxiwashMachineType, isDryer: boolean) {
     const {props, state} = this;
-    let button: {text: string; icon: string; onPress: () => void} = {
-      text: i18n.t('screens.proxiwash.modal.ok'),
-      icon: '',
-      onPress: () => undefined,
-    };
+    let button: {text: string; icon: string; onPress: () => void} | undefined;
     let message = this.modalStateStrings[item.state];
     const onPress = () => this.onSetupNotificationsPress(item);
     if (item.state === MachineStates.RUNNING) {
@@ -247,7 +243,7 @@ class ProxiwashScreen extends React.Component<PropsType, StateType> {
           <Text>{message}</Text>
         </Card.Content>
 
-        {button.onPress ? (
+        {button ? (
           <Card.Actions>
             <Button
               icon={button.icon}