Revert "Allow loading of host runtime for Windows"

This reverts commit 3248101b.

Reason for revert: DroidMonitor: Potential culprit for http://b/372943493 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted

Change-Id: Ida94988ed55974734312e5367c7eebb09152b4ea