Remove unnecessary line setting window size

Remove unnecessary line setting window size

Maximized window does not need to set its size on application side.
Because of the unnecessary line setting window size, application could get a
black screen for around 2 seconds by window mananger policy.

Please refer to following steps.
(1) Wearable image > contacts > select one item > message button
(2) After step (1), edit message, then added message is not visible because its
window size becomes 1000 * 1000 on 360 * 360 wearable screen.

Change-Id: I48769b89df3d8598f350564d7124fff16e862821