kcms/compositing: remove tearing setting

It's now shown in KScreen instead

src/kcms/compositing/compositing.ui

@@ -207,13 +207,6 @@ you can reset this protection but be aware that this might result in an immediat
      </item>
     </widget>
    </item>
-   <item row="15" column="1">
-    <widget class="QCheckBox" name="kcfg_AllowTearing">
-     <property name="text">
-      <string>Reduce latency by allowing screen tearing artifacts in fullscreen windows</string>
-     </property>
-    </widget>
-   </item>
   </layout>
  </widget>
  <customwidgets>

src/kcms/compositing/kwincompositing_setting.kcfg

@@ -44,11 +44,5 @@
            </choices>
            <default>LatencyExtremelyHigh</default>
        </entry>
-
-       <entry name="AllowTearing" type="Bool">
-           <default>true</default>
-       </entry>
-
     </group>
-
 </kcfg>

src/kcms/compositing/main.cpp

@@ -84,7 +84,6 @@ KWinCompositingKCM::KWinCompositingKCM(QObject *parent, const KPluginMetaData &d
     m_form.kcfg_Enabled->setVisible(!compositingRequired());
     m_form.kcfg_WindowsBlockCompositing->setVisible(!compositingRequired());
     m_form.compositingLabel->setVisible(!compositingRequired());
-    m_form.kcfg_AllowTearing->setVisible(compositingRequired());
 
     connect(this, &KWinCompositingKCM::defaultsIndicatorsVisibleChanged, this, &KWinCompositingKCM::updateUnmanagedItemStatus);