[PATCH 8/9] perf build: Remove leftovers of removed build options

[Ian Rogers <irogers@google.com>]

NO_LIBDW_DWARF_UNWIND, NO_SYSCALL_TABLE and the embedded clang/LLVM
support were all removed, but each removal left the matching entry in
the build test suite behind:

  run += make_no_libdw_dwarf_unwind
  run += make_no_syscall_tbl
  run += make_with_clangllvm

None of these have a make_* variable defining what to build, so $($@)
expands to nothing and each one silently repeats the plain "make_pure"
build. The suite therefore spends six builds, as every test is also run
with O=, appearing to cover options that no longer exist.

Remove them, along with the NO_LIBDW_DWARF_UNWIND comment that is still
in Makefile.perf.

Fixes: 2e9191573a69 ("perf build: Remove NO_LIBDW_DWARF_UNWIND option")
Fixes: 3cc550f5bbcf ("perf tools: Remove dependency on libaudit")
Fixes: 56b11a2126bf ("perf bpf: Remove support for embedding clang for compiling BPF events (-e foo.c)")
Signed-off-by: Ian Rogers <irogers@google.com>
Assisted-by: Antigravity:gemini-3.1-pro
---
 tools/perf/Makefile.perf | 3 ---
 tools/perf/tests/make    | 3 ---
 2 files changed, 6 deletions(-)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 2438b40eaaec..53f538cc8e1a 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -64,9 +64,6 @@ include ../scripts/utilities.mak
 #
 # Define NO_LIBBIONIC if you do not want bionic support
 #
-# Define NO_LIBDW_DWARF_UNWIND if you do not want libdw support
-# for dwarf backtrace post unwind.
-#
 # Define NO_LIBTRACEEVENT=1 if you don't want libtraceevent to be linked,
 # this will remove multiple features and tools, such as 'perf trace',
 # that need it to read tracefs event format files, etc.
diff --git a/tools/perf/tests/make b/tools/perf/tests/make
index f879f8109072..608470ff9c10 100644
--- a/tools/perf/tests/make
+++ b/tools/perf/tests/make
@@ -157,7 +157,6 @@ run += make_no_demangle
 run += make_no_libelf
 run += make_no_libdw
 run += make_libunwind
-run += make_no_libdw_dwarf_unwind
 run += make_no_backtrace
 run += make_no_libcapstone
 run += make_libcapstone_dlopen
@@ -167,10 +166,8 @@ run += make_no_libbpf
 run += make_no_libbpf_DEBUG
 run += make_no_libllvm
 run += make_no_sdt
-run += make_no_syscall_tbl
 run += make_no_babeltrace2
 run += make_with_coresight
-run += make_with_clangllvm
 run += make_no_libpfm4
 run += make_refcnt_check
 run += make_help
-- 
2.55.0.1032.g73a4cd73de-goog