Revert^3 "Add the mainline framework boot image extension to the default."

This reverts commit 43f9a4abb838afba01815532832c5c1a606771dc.

Reason for revert: Caused various SH regressions.

Bug: 271036161
Change-Id: I6e7e3f0f64abbde22d226aadbbf12efb2dd9e7d7
4 files changed