Revert "test cases for the new features"

This reverts commit de0c911e3efb3c643edd3bba7af5d381bdcf5537.
Revert "more test made green"

This reverts commit 84d8b0fb6382a1bb34d9d1a6d54b25953f93e84d.
Revert "further fixes for void stripping. fixes tvoid."

This reverts commit dd9914f6186d9b37efbed1bfc2f3aab43bacd939.
Revert "fix threading tests"

This reverts commit eac81f2f077af9b2949b1887d1bf1897d4314111.
Revert "fix tforwardgeneric"

This reverts commit 83c063fcab24190955781eb868dd8cdabcd2c951.
Revert "static and default params for generics"

This reverts commit b540845bce316f997cdbffbde19af1bf4c2558d5.
Revert "allow keyword params for the `[]` and `{}` operators"

This reverts commit 85dae11f1a7f50a1253cf54e726e850e35f7b82f.
Revert "allow `void` as a field type"

This reverts commit 8f0a74a1e6cdf7b0b1c1771ac8d04bf636f8791f.
Revert "bugfix: emulated thread vars used in combination with the mark & sweep GC"

This reverts commit 6eb6cfd679c31083dd45aa6c14af54f44362f8fb.
Revert "fixes #267"

This reverts commit 087467eee72f3f84d4ba326775b5908d5c93eec8.