message: fix(makefile) Remove duplicated instructions.
diff: @@ -415,8 +415,6 @@ ifeq ($(OS), Windows_NT)
  iscc scripts/windows-installer/wasmer.iss
  cp scripts/windows-installer/WasmerInstaller.exe dist/
  else
  - cp LICENSE package/LICENSE
  - cp ATTRIBUTIONS.md package/ATTRIBUTIONS
  tar -C package -zcvf wasmer.tar.gz bin lib include LICENSE ATTRIBUTIONS
  mv wasmer.tar.gz dist/
  endif
  