Revert "Clear All button added in  Recent Panelview. Ref: https://github.com/temasek/android_frameworks_base/commit/a129580ee886b48c124de716236c2bae2b93a77b"

This was mistake.. Sorry for trouble.

This reverts commit f29f4056d2ea83de1767f47ea698dd20830f5c4a.

Change-Id: Ie1991131c11293ee812cfeca0db4c372061eb62a