[lightbeam] Can't pass different params to different elements of br_table yet

[bjorn3]

thread 'main' panicked at 'Can't pass different params to different elements of `br_table` yet', lightbeam/src/function_body.rs:508:29
stack backtrace:
   0: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
   1: core::fmt::write
   2: std::io::Write::write_fmt
   3: std::panicking::default_hook::{{closure}}
   4: std::panicking::default_hook
   5: std::panicking::rust_panic_with_hook
   6: std::panicking::begin_panic
   7: lightbeam::backend::Context<M>::br_table
   8: lightbeam::function_body::translate
   9: <wasmtime_environ::lightbeam::Lightbeam as wasmtime_environ::compilation::Compiler>::compile_module
  10: wasmtime_jit::compiler::Compiler::compile
  11: wasmtime_jit::instantiate::RawCompiledModule::new
  12: wasmtime_jit::instantiate::instantiate
  13: wasmtime_api::instance::Instance::new
  14: wasmtime::instantiate_module
  15: wasmtime::rmain
  16: wasmtime::main
  17: std::rt::lang_start::{{closure}}
  18: std::panicking::try::do_call
  19: __rust_maybe_catch_panic
  20: std::rt::lang_start_internal
  21: main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

While trying to run rustc compiled to wasm.

[alexcrichton]

Lightbeam was removed in #3390 as explained in RFC 14, so I'm going to close this.