library: remove one needless function call, <STAT> api

library: remove one needless function call, <STAT> api

This small change is an outgrowth of the research into
the bug represented by that merge request shown below.

With the master branch, a real buglet was subsequently
addressed. In this newlib branch, no bug existed since
the <stat> API relies solely on just cpus reflected in
(and parsed from) the kernel's /proc/stat pseudo file.

[ since that procps_stat_new() priming read about to ]
[ be performed will value info->cpus.total, there is ]
[ no need to separately invoke a procps_cpu_count(). ]

Reference(s):
https://gitlab.com/procps-ng/procps/merge_requests/82

Signed-off-by: Jim Warner <james.warner@comcast.net>