Filters/Geometry: Remove some unused functions from tests

Change-Id: Ic1ae3928ee171531136d42630fec6484eb0a9cbd
Filters/Geometry: Hide WriteGrid if ENABLE_IO isn't on

It is unused otherwise.

Change-Id: Ic13a1e15ae2dd121b0122e7b520551184da57e2c
Merge topic 'remove-unused-functions' into master

964d6c80 Filters/Geometry: Hide WriteGrid if ENABLE_IO isn't on
2b67930d Filters/Geometry: Remove some unused functions from tests