Remove initialization from PendingBackendStats
9a8dd2c5a6d has added an initialization to PendingBackendStats, which
has been causing compilation warnings in the buildfarm. This code does
not strictly require it as PendingBackendStats is always initialized
with memset(0), so let's remove it.
Per report from multiple buildfarm members, like ayu and batfish, via
Tom Lane.
Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Discussion: https://postgr.es/m/
1870853.
1741749264@sss.pgh.pa.us