remove old & useless log

app/src/main/java/info/nightscout/android/medtronic/MainActivity.java

@@ -750,8 +750,6 @@ public class MainActivity extends AppCompatActivity implements OnSharedPreferenc
             PumpInfo pump = getActivePump();
 
             if (pump != null && pump.isValid() && pump.getPumpHistory().size() > 0) {
-                Log.d(TAG, "history display refresh size: " + pump.getPumpHistory().size());
-                Log.d(TAG, "history display refresh date: " + pump.getPumpHistory().last().getEventDate());
                 pumpStatusData = pump.getPumpHistory().last();
             }