Documentation: arm64: Remove stale and redundant virtual memory diagrams

Documentation: arm64: Remove stale and redundant virtual memory diagrams

The arm64 'memory.rst' file tries to document the virtual memory map
and the translation procedure for a couple of kernel configurations.

Unfortunately, the virtual memory map changes relatively frequently and
we support considerably more configurations than we did when the docs
were introduced (e.g. we now have support for 16KiB pages and 52-bit
addressing). Furthermore, the Arm ARM is the definitive resource for the
translation procedure and so there's little point in duplicating part
of that information in the kernel documentation.

Rather than continue trying (and failing) to maintain these diagrams,
let's rip them out. The kernel page-table can be dumped using
CONFIG_PTDUMP_DEBUGFS if necesssary.

Link: https://lore.kernel.org/r/20250102065554.1533781-1-sangmoon.kim@samsung.com
Reported-by: Sangmoon Kim <sangmoon.kim@samsung.com>
Signed-off-by: Will Deacon <will@kernel.org>