Revert "ibmi: add support for IBM i to cmake build"
Revert "ibmi: add support for IBM i to cmake build"

This reverts commit 8d62d933ef31fd47ae269395364a280a12eb9636.
The corresponding autotools update broke the CI. This commit
is reverted for consistency.

Refs: https://github.com/libuv/libuv/pull/2148
PR-URL: https://github.com/libuv/libuv/pull/2156
Reviewed-By: Santiago Gimeno <3f17e29e343c4cf8809fb0970d81d6d8ee88d6b3@gmail.com>

unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso