Revert "gs101: use prebuilt GKI boot.img for production builds"

This reverts commit 63ba0cb1affa83446f10585d403c81cc618be71a.

Reason for revert: Tentatively trying to address, http://b/193588301 OTA full package does not exist in O6/R4_SD1A.210714.001 userdebug build [SD1A]

Bug: 193588301
Change-Id: I9d5d9fc132bc7eaf7c0adccee7a18558d80edb40
1 file changed