Revert "Add a check to verify that the grid we're migrating to is valid"

This reverts commit 0d16b52156153d7dbeda5d260e3c2e8634e3975f.

Reason for revert: doesn't resolve the issue since IDP is still a different grid, it just doesn't migrate the icons over to the new grid, but the new grid would still appear

Bug: 419252682
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:3b9bf4ce15719bd764364dc2b60ea48f76813e6d)
Merged-In: I4313f5aab726d07c906167fcaa340efae2c0e317
Change-Id: I4313f5aab726d07c906167fcaa340efae2c0e317
4 files changed