Revert "README: add known issue about dry run in host mode"
Revert "README: add known issue about dry run in host mode"

* Since dry run in host mode has been fixed by the previous 2 commits

This reverts commit 7aa97e79775cc7de3825632a715370d45dd8c078.

openil/sja1105-tool,openil/sja1105-tool