perf trace: Remove --map-dump documentation

JIRA: https://issues.redhat.com/browse/RHEL-78200

upstream
========
commit 46e3464
Author: Howard Chu <howardchu95@gmail.com>
Date: Sun Jun 1 10:32:52 2025 -0700

description
===========
The --map-dump option was removed in 5e6da6b ("perf trace: Migrate
BPF augmentation to use a skeleton"), this patch removes its remaining
documentation.

Fixes: 5e6da6b ("perf trace: Migrate BPF augmentation to use a skeleton")
    Signed-off-by: Howard Chu <howardchu95@gmail.com>
    Link: https://lore.kernel.org/r/20250601173252.717780-1-howardchu95@gmail.com
    Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Signed-off-by: Anubhav Shelat <ashelat@redhat.com>

Author: AnubhavS1

tools/perf/Documentation/perf-trace.txt

@@ -238,14 +238,6 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs.
 	the same beautifiers used in the strace-like enter+exit lines to augment the
 	tracepoint arguments.
 
---map-dump::
-	Dump BPF maps setup by events passed via -e, for instance the augmented_raw_syscalls
-	living in tools/perf/examples/bpf/augmented_raw_syscalls.c. For now this
-	dumps just boolean map values and integer keys, in time this will print in hex
-	by default and use BTF when available, as well as use functions to do pretty
-	printing using the existing 'perf trace' syscall arg beautifiers to map integer
-	arguments to strings (pid to comm, syscall id to syscall name, etc).
-
 --force-btf::
 	Use btf_dump to pretty print syscall argument data, instead of using hand-crafted pretty
 	printers. This option is intended for testing BTF integration in perf trace. btf_dump-based