perf tools: Remove unused perf_pathdup, xstrdup functions

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-s87zi5d03m6rz622y1z6rlsa@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/cache.h

@@ -70,7 +70,4 @@ char *strip_path_suffix(const char *path, const char *suffix);
 char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 char *perf_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 
-char *perf_pathdup(const char *fmt, ...)
-	__attribute__((format (printf, 1, 2)));
-
 #endif /* __PERF_CACHE_H */