Remove unreachable code

Author: gnzlbg

src/librustc_mir/interpret/terminator.rs

@@ -249,11 +249,6 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
 
         match instance.def {
             ty::InstanceDef::Intrinsic(..) => {
-                if let Abi::RustIntrinsic | Abi::PlatformIntrinsic = caller_abi {
-                    // ok
-                } else {
-                    throw_unsup!(FunctionAbiMismatch(caller_abi, Abi::RustIntrinsic))
-                }
                 // The intrinsic itself cannot diverge, so if we got here without a return
                 // place... (can happen e.g., for transmute returning `!`)
                 let dest = match dest {