msm: camera: sensor: Remove redundant delete settings

Init settings and config settings are deleted immediately
after they have been applied. Therefore, no need to delete
them again when we release resources.

Change-Id: I5fdf66c9d4421380f6675e9a1d2b0f1e5cd00eac
Signed-off-by: Vishalsingh Hajeri <vhajeri@codeaurora.org>