Logcatd: remove some extra logic

There will be some unnecessary error logs caused
by extra logic was reported by init when some properties
were set default values. This patch remove these logic
codes to remove these avoidable error logs.

Bug: 137567691
Test: Can use logcat -r -n with configures

Change-Id: I9b8fa2025bcbef5d39438a8243f9ff5dc0a645df
Signed-off-by: Tian, Baofeng <baofeng.tian@intel.com>
Signed-off-by: Duan, YayongX <yayongx.duan@intel.com>