Fix signal connection nodiscard warnings (#4818)

src/providers/twitch/TwitchAccountManager.cpp

@@ -20,7 +20,9 @@ TwitchAccountManager::TwitchAccountManager()
         currentUser->loadSeventvUserID();
     });
 
-    this->accounts.itemRemoved.connect([this](const auto &acc) {
+    // We can safely ignore this signal connection since accounts will always be removed
+    // before TwitchAccountManager
+    std::ignore = this->accounts.itemRemoved.connect([this](const auto &acc) {
         this->removeUser(acc.item.get());
     });
 }