tcf-agent: Remove unnecessary .bbappend

:Release Notes:
It's already resolved in oe-core revision we're using by
http://git.openembedded.org/openembedded-core/commit/?id=22bce79652fc753a7b5d536664b744e110b5775a

:Detailed Notes:

:Testing Performed:
Only build tested.

:QA Notes:
No change to image.

:Issues Addressed:
[GF-42606] Ongoing metadata improvement/cleanup work

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@lge.com>
Change-Id: Ic19d718a1c2a4fce645f25364c0cf5537f498999