enum LLVMLandingPadClauseTy has never been used and exists by mistake. [This](772fe17a6d (diff-9e2da57026497163c9f7396a48567626a0b94828a5757436ef20a4e67522525d)) commit added a LLVMAddClause function that took it as a parameter. [Here](10c6d12a9f (diff-6e588c82c378e251a7d265b08973d4a7312a592756f88023cd317f109083de10)) the enum was removed. And [here](e6e8826870 (diff-9e2da57026497163c9f7396a48567626a0b94828a5757436ef20a4e67522525d)) it is added again by mistake, although the LLVMAddClause function no longer accepts it