Revert "continuation of ascent/descent fix by tom - make textblock work too."

Revert "continuation of ascent/descent fix by tom - make textblock work too."

This reverts commit 9473c4a9a5b9e056e516b660895cb83c64a1c77f.

This commit is not correct. It just goes through every font in the
fontset, which is usually all the fonts in the system and tries to get
their ascent/descent and by that getting the max ascent/descent. This
won't work nicely.

The solution is to properly fix textblock, if you think there's
something lacking (I.e in the same way I did text).

However, my changes did not change previous behaviour, but were just
wrappers, so I don't see why extra changes would be needed. Please
elaborate.

I'm reverting this because:
1. I don't think it's correct.
2. It severly broke e in some cases (reference:
      http://www.enlightenment.org/ss/e-51b5d5e98cd387.04568822.png ).