This breaks the build for qmake-based applications,
with the error
Project ERROR: Could not find feature sse2.
Remove the offending section to make applications
build again.
Pick-to: 6.2
Change-Id: I0b22faa1d8d62e208d79879b822e21637bb03a3e
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>