enc2gen: remove subsumed vex mem fn calls & dead pattern recognizers
enc2gen: remove subsumed vex mem fn calls & dead pattern recognizers

Change-Id: I54232ef1f4809d624599e2e6bdf9fb3d4e97349a
(cherry picked from commit 5059100ea0ef8d7a30ef0ef55055639807488d2a)

intelxed/xed,intelxed/xed,intelxed/xed,intelxed/xed