[automerger] Decoder: Delete node from st if lt and st point to same am: f312a1d305 am: f82a1f8d7f am: ae2c8cfdc1 am: 8332d0bfa2 am: 1e6ef7fee5 am: b1734142ff
am: 9460fbd521

Change-Id: I0c53bc30225153ff03d44670f6967a05e161c654