Revert "ContextSuggester"

Reverting context suggester due to #5525 The release of this
feature is delayed untile `v1.2`

This reverts commit 44f52e474cc68e2dbd4515304f0fd7f109951da5.
This reverts commit 8c592101aee9640b42bd9336db33ad7f09d339d2.