WIP: Writing Modes: remove tests that has 1 letter inside `.tcy`

I thought `<span.tcy>A</span>` and `<span.orient-upright>A</span>`
will match; however, it's not. In `text-combine-upright` UA is allowed
to compress or to scale the composition within the 1em square; that
means the letter "A" can be horizontally scaled and thus will not
match rotated "A".

I'm removing the tests and their refs for now. We need a font which
has two glyphs that are 1em square and one will match the another when
rotated. Imagine a glyph similar to the CID 0001 glyph in the CSS
Full-Width Orientation Test font.

Bug: https://github.com/w3c/csswg-test/issues/568