Revert "Fix problem of RepackApexPayload when using option --signing_args"

This reverts commit 5ebc4feb.

Reason for revert: This is causing the signing args to be improperly passed to apexer, treating them as if they are not specified as all.

Bug: 361784913
(cherry picked from https://android-review.googlesource.com/q/commit:58992a6052555872e0bfceb9e27022c5432ef761)
Merged-In: Ifa0f8444a4a1871802316511b0ff0735f3350b2c
Change-Id: Ifa0f8444a4a1871802316511b0ff0735f3350b2c