[IL52] Remove a useless method.

This old method doesn't even re-read the old suggestions. It used to
recompute them without the coordinates.
Re-using the recorrection code, which is much more advanced, is
the right thing to do here.

Also, refining the test. It's no use trying to resume suggestion
if we don't have a suggestion strip, since we aren't going to
auto-correct anything anyway.

Not the motivation for this change, but this also fixes
Bug: 11620256
Change-Id: Id49efa32e293c49837c61fdc752c86bbac1d2c88