unified-system-plugin: Revert changes for supporting unified-system-service package
Since the 'run multiple services in one process' feature will be
implemented with united-service, previous implementations should be
removed.
This reverts commits below(old to new):
*
c4236143e4b338d711fe3c57c1fdb8b5d92dc646
*
edf84604d085871db10c1ee57b87fb16a5888af4
*
b5c0b7f06e15ba50ad825bc054ed3db7347d9114
*
dab783680bfd8e060d9f67a54a0f71e237861dac
Change-Id: I0068cdaff7dfeb26187352f7b7e331fd0930482e
Signed-off-by: SangYoun Kwak <sy.kwak@samsung.com>