Revert "ANDROID: arm: process: Add display of memory around registers when displaying regs."

This reverts commit 8537ffb8.

This change has been deprecated in newer Android kernels, and upstream
changes to the location of kernel text broke its original purpose, so
let's just remove it.

Bug: 124903482
Change-Id: Id874a14aaf9951c3ba44d43eea3f1ef513dfe26e
Signed-off-by: Alistair Strachan <astrachan@google.com>