perf doc: Reorganize ARTICLES variables.

Place early, as they are in the git Makefile. Remove references to a
'technical` directory that doesn't exist in perf.
Signed-off-by: NIan Rogers <irogers@google.com>
Acked-by: NNamhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https //lore.kernel.org/r/20210715013343.2286699-8-irogers@google.com
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Documentation/Makefile

@@ -2,6 +2,10 @@
 include ../../scripts/Makefile.include
 include ../../scripts/utilities.mak
 
+ARTICLES =
+# with their own formatting rules.
+SP_ARTICLES =
+
 MAN1_TXT= \
 	$(filter-out $(addsuffix .txt, $(ARTICLES) $(SP_ARTICLES)), \
 		$(wildcard perf-*.txt)) \
@@ -16,13 +20,6 @@ _MAN_HTML=$(patsubst %.txt,%.html,$(MAN_TXT))
 MAN_XML=$(addprefix $(OUTPUT),$(_MAN_XML))
 MAN_HTML=$(addprefix $(OUTPUT),$(_MAN_HTML))
 
-ARTICLES =
-# with their own formatting rules.
-SP_ARTICLES =
-API_DOCS = $(patsubst %.txt,%,$(filter-out technical/api-index-skel.txt technical/api-index.txt, $(wildcard technical/api-*.txt)))
-SP_ARTICLES += $(API_DOCS)
-SP_ARTICLES += technical/api-index
-
 _DOC_HTML = $(_MAN_HTML)
 _DOC_HTML+=$(patsubst %,%.html,$(ARTICLES) $(SP_ARTICLES))
 DOC_HTML=$(addprefix $(OUTPUT),$(_DOC_HTML))