message: dont install wasm-pack for webpack type projects
diff: @@ -167,15 +167,6 @@ fn setup_build(target: &Target) -> Result<(Command, PathBuf, Bundle), failure::E
  let wranglerjs_path = install().expect("could not install wranglerjs");
  command.arg(wranglerjs_path);
  - // export WASM_PACK_PATH for use by wasm-pack-plugin
  - // https://github.com/wasm-tool/wasm-pack-plugin/blob/caca20df84782223f002735a8a2e99b2291f957c/plugin.js#L13
  - let tool_name = "wasm-pack";
  - let tool_author = "rustwasm";
  - let version = install::get_latest_version(tool_name)?;
  - let wasm_pack_path =
  - install::install(tool_name, tool_author, true, version)?.binary("wasm-pack")?;
  - command.env("WASM_PACK_PATH", wasm_pack_path);
  -
  // create a temp file for IPC with the wranglerjs process
  let mut temp_file = env::temp_dir();
  temp_file.push(format!(".wranglerjs_output{}", random_chars(5)));
  