Remove stray file and unused variable

It seems like they were introduced by accident while resolving merge
conflicts.

plugins/platforms/virtual/screens_virtual.cpp

-/*
-    KWin - the KDE window manager
-    This file is part of the KDE project.
-
-    SPDX-FileCopyrightText: 2015 Martin Gräßlin <mgraesslin@kde.org>
-
-    SPDX-License-Identifier: GPL-2.0-or-later
-*/
-#include "screens_virtual.h"
-#include "virtual_backend.h"
-#include "virtual_output.h"
-
-namespace KWin
-{
-
-VirtualScreens::VirtualScreens(VirtualBackend *backend, QObject *parent)
-    : OutputScreens(backend, parent)
-    , m_backend(backend)
-{
-    connect(backend, &VirtualBackend::screensQueried, this, &VirtualScreens::updateCount);
-    connect(backend, &VirtualBackend::screensQueried, this, &VirtualScreens::changed);
-}
-
-VirtualScreens::~VirtualScreens() = default;
-
-void VirtualScreens::init()
-{
-    updateCount();
-    KWin::Screens::init();
-
-    connect(m_backend, &VirtualBackend::virtualOutputsSet, this,
-        [this] (bool countChanged) {
-            if (countChanged) {
-                setCount(m_backend->outputs().size());
-            } else {
-                emit changed();
-            }
-        }
-    );
-
-    emit changed();
-}
-
-}

plugins/platforms/virtual/virtual_backend.cpp

@@ -107,8 +107,6 @@ void VirtualBackend::setVirtualOutputs(int count, QVector<QRect> geometries, QVe
     Q_ASSERT(geometries.size() == 0 || geometries.size() == count);
     Q_ASSERT(scales.size() == 0 || scales.size() == count);
 
-    bool countChanged = m_outputs.size() != count;
-
     while (!m_outputsEnabled.isEmpty()) {
         VirtualOutput *output = m_outputsEnabled.takeLast();
         emit outputDisabled(output);