perf map: Ditch leftover map__reloc_vmlinux() prototype

In 39b12f78 ("perf tools: Make it possible to read object code from vmlinux")
the actual function was removed, but we forgot to remove the prototype,
fix it.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-35yy50cgpcx8cjorluwd5j53@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/map.h

@@ -144,8 +144,6 @@ struct symbol *map__find_symbol_by_name(struct map *map, const char *name);
 void map__fixup_start(struct map *map);
 void map__fixup_end(struct map *map);
 
-void map__reloc_vmlinux(struct map *map);
-
 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name,
 				    u64 addr);