There was some check regarding specific features Vim have, like
spell check which was introduced with Vim 7.0, and even on old
repositories, the oldest version of Vim I could find is 7.4. Let's get
rid of unnecessary legacy.
Nowadays, all significant terminals are capable for displaying at least
256 colors, that's why I decided to drop support for old 88 color, since
the approximation is pretty inaccurate for such terms.
gryf