Revert "Dynamically lookup shaded OBC version for remapping 1.5.2/1.5.1"

This reverts commit 6968fa7629c140da11e4b63d9237af6b04a19ae5.
Revert "Add configuration option to control remapping to future versions. Fixes #913."

This reverts commit e0a7ddf4f23f57dee5053037d46809f3e1940c92.
Revert "Add Class.forName("") plugin class reflection remapping. Closes #902."

This reverts commit dbf16543cf621d7674824ff568dd7858155a9cf3.
Revert "Update to SpecialSource 1.6-SNAPSHOT to fix plugin remapping on Java 8. Fixes #841."

This reverts commit 43e6eb079e5b0bbe40e7ecac898254f426828ad8.
Revert "Fix NPE from mod inventories in transferTo(). Fixes #896."

This reverts commit 9e93ac2b7fc900cf3a292ad715b8463bca4cece7.
Revert "Add support for coremods improperly handling non-existent classes. Fixes #889."

This reverts commit b09b4bab4697c9ac4b1da9d426c0175422017091.
Revert "Fix NPE in EntityTargetEvent when calling resetTask() twice. Fixes #877."

This reverts commit 1abe2e8811629ad8bb7980f1b9012d5827069371.