yuzu/configuration/configure_web: Remove an unused lambda capture

'this' isn't actually used within the lambda, since what we need
from the class is already assigned within the capture section of
the lambda.

src/yuzu/configuration/configure_web.cpp

@@ -90,11 +90,10 @@ void ConfigureWeb::OnLoginChanged() {
 void ConfigureWeb::VerifyLogin() {
     ui->button_verify_login->setDisabled(true);
     ui->button_verify_login->setText(tr("Verifying..."));
-    verify_watcher.setFuture(
-        QtConcurrent::run([this, username = ui->edit_username->text().toStdString(),
-                           token = ui->edit_token->text().toStdString()]() {
-            return Core::VerifyLogin(username, token);
-        }));
+    verify_watcher.setFuture(QtConcurrent::run([username = ui->edit_username->text().toStdString(),
+                                                token = ui->edit_token->text().toStdString()] {
+        return Core::VerifyLogin(username, token);
+    }));
 }
 
 void ConfigureWeb::OnLoginVerified() {