libutils: Remove a little dead code

With our recent change 0455a2c39c781a8153c1090a4638193b4181379d,
there's some logic that can be simplified to make this slightly
easier to read.

This CL does not change the behavior of this code.

Bug: 208895940
Test: TreeHugger
Change-Id: I4de2dbaf4406cbb7785df8839bb3ae453186ea69
1 file changed