Remove unused stuff

src/org/kde/kdeconnect/Plugins/PresenterPlugin/PresenterPlugin.kt

@@ -19,8 +19,6 @@ import org.kde.kdeconnect_tp.R
 
 @LoadablePlugin
 class PresenterPlugin : Plugin() {
-    val isPointerSupported: Boolean
-        get() = device.supportsPacketType(PACKET_TYPE_PRESENTER)
 
     override val displayName: String
         get() = context.getString(R.string.pref_plugin_presenter)

src/org/kde/kdeconnect/Plugins/SMSPlugin/SMSPlugin.kt

@@ -459,9 +459,6 @@ class SMSPlugin : Plugin() {
          */
         private const val PACKET_TYPE_SMS_REQUEST: String = "kdeconnect.sms.request"
 
-        /** We *handle* packets of this version or lower. Update this number only if future packets break backwards-compatibility. **/
-        private const val SMS_REQUEST_PACKET_VERSION: Int = 2
-
         /**
          * Packet sent to request the most-recent message in each conversations on the device
          *