diff --git a/libinput/connection.cpp b/libinput/connection.cpp
index 20a3b93ec7..82c374d715 100644
--- a/libinput/connection.cpp
+++ b/libinput/connection.cpp
@@ -28,8 +28,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "../udev.h"
 #include "libinput_logging.h"
 
-#include <KConfigGroup>
-
 #include <QDBusMessage>
 #include <QDBusConnection>
 #include <QDBusPendingCall>
@@ -603,23 +601,6 @@ void Connection::applyDeviceConfig(Device *device)
     // pass configuration to Device
     device->setConfig(m_config->group("Libinput").group(QString::number(device->vendor())).group(QString::number(device->product())).group(device->name()));
     device->loadConfiguration();
-
-    if (device->isPointer() && !device->isTouchpad()) {
-        const KConfigGroup group = m_config->group("Mouse");
-        device->setLeftHanded(group.readEntry("MouseButtonMapping", "RightHanded") == QLatin1String("LeftHanded"));
-        qreal accel = group.readEntry("Acceleration", -1.0);
-        if (qFuzzyCompare(accel, -1.0) || qFuzzyCompare(accel, 1.0)) {
-            // default value
-            device->setPointerAcceleration(0.0);
-        } else {
-            // the X11-based config is mapped in [0.1,20.0] with 1.0 being the "normal" setting - we assume that's the default
-            if (accel < 1.0) {
-                device->setPointerAcceleration(-1.0 + ((accel * 10.0) - 1.0) / 9.0);
-            } else {
-                device->setPointerAcceleration((accel -1.0)/19.0);
-            }
-        }
-    }
 }
 
 void Connection::slotKGlobalSettingsNotifyChange(int type, int arg)