remove LwpSvStream::operator>> methods

in favour of ReadXXX methods.

Change-Id: Ifa627cf190b22315f4ce294c1ec268c4d1361748
remove operator>> methods

in favour of ReadXXX methods.

Change-Id: I242b92da7dbcafe22aef69dc7348ac58dadc9241
remove operator>> and operator<< methods

in favour of ReadXXX/WriteXXX methods

Change-Id: I39dfeee92e5b01fdf43db3bbee0f2fc471017653