This commit reverts 57431a91.

While that's still a good idea in the abstract, we found out
that there are multiple crasher bugs in it on Windows builds,
making the logging_collector option unusable on Windows.
There's no time left to fix these issues before 12beta1,
so revert the patch to allow Windows beta testing to proceed.
We'll try again at some future date.

Per bug #15804 from Yulian Khodorkovskiy and additional
investigation by Michael Paquier.

Discussion: https://postgr.es/m/15804-3721117bf40fb654@postgresql.org