Eliminate folly/system/VersionCheck
Eliminate folly/system/VersionCheck

Summary: Neither Folly nor Thrift actually version anymore and haven't in multiple years, so just remove the code to do this.

Reviewed By: yfeldblum

Differential Revision: D7512580

fbshipit-source-id: 89c61cf4ef3d78ea7c09ba6855e0717cfbe022d6

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift