Summary:
This reverts commit 146968c6.

Revert "create dagster-aws-pyspark library with emr_pyspark_step_launcher"

This reverts commit 0bfc6665.

Depends on D4938.

Test Plan: bk

Reviewers: schrockn, cdecarolis

Reviewed By: cdecarolis

Differential Revision: https://dagster.phacility.com/D4940