TMP: Remove fatal-meson-warnings

See https://github.com/mesonbuild/meson/pull/4630
9 jobs for ci-nodownload in 12 minutes and 2 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #172338
cross-android_api21_arm64

00:04:23

passed #172339
cross-android_api28_arm64

00:04:22

passed #172340
cross-mingw64

00:04:45

passed #172337
fedora-autotools-x86_64

00:08:36

passed #172352
fedora-x86_64

00:04:32

passed #172341
win32
msys2-mingw32

00:07:56

failed #172342
win32
vs2017-x64

00:00:12

failed #172336
fedora-x86_64

00:05:55

 
  Coverage
skipped #172343
coverage
 
Name Stage Failure
failed
vs2017-x64 Build
Successfully extracted cache
$ mkdir subprojects\packagecache
$ copy c:\proxy-libintl-0.1.tar.gz subprojects/packagecache/
The system cannot find the file specified.
Uploading artifacts...
WARNING: _build/meson-logs: no matching files
WARNING: Failed to load system CertPool: crypto/x509: system root pool is not available on Windows
Uploading artifacts to coordinator... ok
id=172342 responseStatus=201 Created token=ZRAKhzSW
ERROR: Job failed: exit status 1