Merge #10642: Remove obsolete _MSC_VER check

Summary:
700d8d8 Remove obsolete _MSC_VER check (practicalswift)

Tree-SHA512: 3b33f3ce90a3b3b6abec74990fab88402f896402fc563b7081575f85dab05fc7e21fd4c640ca4b9a57a6ca01c5c8ca931be37cac6fa62968fc7b84c719ec6ede

Backport of Core PR10642
https://github.com/bitcoin/bitcoin/pull/10642/files

Test Plan: make

Reviewers: #bitcoin_abc, deadalnix, nakihito

Reviewed By: nakihito

Subscribers: nakihito

Differential Revision: https://reviews.bitcoinabc.org/D3847