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

This reverts commit c6023aa6.

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: I54ed4423c594cd04910da2e24e520997194d6067
Signed-off-by: Alistair Strachan <astrachan@google.com>