Remove wasm test workaround

Author: JohnTitor

ci/docker/wasm32-unknown-emscripten/node-wrapper.sh

@@ -7,9 +7,5 @@ shift
 dir=$(dirname $me)
 file=$(basename $me)
 
-if echo $file | grep -q wasm; then
-  exit 0 # FIXME(rust-lang/cargo#4750)
-fi
-
 cd $dir
 exec node $file "$@"