selinux: stop checking for deleteAlert method of setroubleshoot

The lack of deleteAlert has already been resolved in RHEL 7, as we no
longer support this the capability check can be removed.

https://bugzilla.redhat.com/show_bug.cgi?id=1306700

pkg/selinux/selinux.js

@@ -129,7 +129,7 @@ const initStore = function(rootElement) {
      * This function will only be called if the backend functionality is actually present
      */
     const deleteAlert = function(alertId) {
-        return dataStore.client.capabilities.deleteAlert(alertId)
+        return dataStore.client.deleteAlert(alertId)
                 .then(() => {
                     let idx;
                     for (idx = dataStore.entries.length - 1; idx >= 0; --idx) {
@@ -155,15 +155,15 @@ const initStore = function(rootElement) {
     const render = function() {
         if (!dataStore.reactRoot)
             dataStore.reactRoot = createRoot(rootElement);
-        const enableDeleteAlert = ('capabilities' in dataStore.client && 'deleteAlert' in dataStore.client.capabilities);
+
         dataStore.reactRoot.render(React.createElement(SETroubleshootPage, {
             connected: dataStore.connected,
             connecting: dataStore.connecting,
             error: dataStore.error,
             dismissError,
             entries: dataStore.entries,
             runFix,
-            deleteAlert: enableDeleteAlert ? deleteAlert : undefined,
+            deleteAlert,
             selinuxStatus: dataStore.selinuxStatus,
             selinuxStatusError: dataStore.selinuxStatusError,
             changeSelinuxMode: selinuxChangeMode,
@@ -255,19 +255,14 @@ const initStore = function(rootElement) {
 
     dataStore.connectionTimeout = 5000;
 
-    function capablitiesChanged(capabilities) {
-        dataStore.capabilities = capabilities;
-        render();
-    }
-
     // try to connect
     dataStore.tryConnect = function() {
         if (dataStore.connecting === null) {
             dataStore.connecting = window.setTimeout(setErrorIfNotConnected, dataStore.connectionTimeout);
             render();
             // initialize our setroubleshootd client
-            dataStore.client.init(capablitiesChanged)
-                    .then(capablitiesChanged => {
+            dataStore.client.init()
+                    .then(() => {
                         dataStore.connected = true;
                         window.clearTimeout(dataStore.connecting);
                         dataStore.connecting = null;

pkg/selinux/setroubleshoot-client.js

@@ -31,7 +31,7 @@ const busNameFixit = "org.fedoraproject.SetroubleshootFixit";
 const dbusInterfaceFixit = busNameFixit;
 const dbusPathFixit = "/org/fedoraproject/SetroubleshootFixit/object";
 
-client.init = function(capabilitiesChangedCallback) {
+client.init = function() {
     client.connected = false;
     const dbusClientSeTroubleshoot = cockpit.dbus(busName, { superuser: "try" });
     client.proxy = dbusClientSeTroubleshoot.proxy(dbusInterface, dbusPath);
@@ -148,7 +148,7 @@ client.init = function(capabilitiesChangedCallback) {
     /* Delete an alert from the database (will be removed for all users), returns true on success
      * Only assign this to the client variable if the dbus interface actually supports the operation
      */
-    const deleteAlert = localId => client.proxy.call("delete_alert", [localId])
+    client.deleteAlert = localId => client.proxy.call("delete_alert", [localId])
             .then(success => {
                 if (!success)
                     return Promise.reject(new Error(cockpit.format(_("Failed to delete alert: $0"), localId)));
@@ -158,22 +158,6 @@ client.init = function(capabilitiesChangedCallback) {
                 return Promise.reject(new Error(cockpit.format(_("Failed to delete alert: $0"), ex.toString())));
             });
 
-    // earlier versions of the dbus interface don't support alert deletion/dismissal
-    // HACK https://bugzilla.redhat.com/show_bug.cgi?id=1306700
-    // once every client we ship to handles these features, we can remove the capabilities check
-    client.capabilities = { };
-
-    // wait for metadata - if this has the method delete_alert, we can use that
-    dbusClientSeTroubleshoot.addEventListener("meta", function(event, meta) {
-        if (dbusInterface in meta && 'methods' in meta[dbusInterface] && 'delete_alert' in meta[dbusInterface].methods)
-            client.capabilities.deleteAlert = deleteAlert;
-        else
-            delete client.capabilities.deleteAlert;
-
-        if (capabilitiesChangedCallback)
-            capabilitiesChangedCallback(client.capabilities);
-    });
-
     // connect to dbus and start setroubleshootd
     return connectPromise;
 };