Revert "Adding adb_debug.prop"

This reverts commit a280a66b.

/init now switched to read adb_debug.prop from debug ramdisk instead
of GSI or other system.img. No need to keep the file in GSI.

See the following for more details:
  https://android-review.googlesource.com/c/platform/system/core/+/946517

Bug: 126493225
Test: tree hugger
Change-Id: I981db8e13216fbe0f066f4d3684ee149b1177d22