I propose we remove "Default boot and install (i386)" section from
https://fedoraproject.org/wiki/Template:Installation_test_matrix

We no longer have i386 references anywhere, just in that installation matrix. It has been an alternate arch since F26 and not blocking as an installation medium since F25. The existing section just makes the page longer and less readable. I see no harm removing it. OpenQA results will still be visible on OpenQA homepage. Thoughts?