Remove dataformatter

[86sanj]

The current project supports features like data transformation, dataset IO, stats, and analysis on the notebook. In this release, we will remove all dependencies and code related data transformation to keep datasetinsights focused on io and statistics. This will reduce heavy decencies and will make it easier for user to consume data from perception SDK without taking heavy dependencies.

• Remove command and transformer and corresponding Unit test case.
• Remove Unity perception module, and use its API by installing dataformatter from PYPI
• Prune dependencies
• Update README and Sphnix docs