message: refactor(store): Return unsubscribe directly
diff: @@ -535,7 +535,7 @@ module.exports.observe = (onChange) => {
  }
  }
  - const unsubscribe = module.exports.subscribe(changeHandler)
  changeHandler()
  - return unsubscribe
  +
  + return module.exports.subscribe(changeHandler)
  }
  