Whenever pub updates the failure messages for proper package validation, this integration test fails because we are checking string messages that come from pub, not webdev. This removes validating that the messages from pub are what is expected, since we don't control those messages in the first place (and therefore shouldn't be testing them).
Fixes https://github.com/dart-lang/webdev/issues/2404, https://github.com/dart-lang/webdev/issues/2050
Whenever pub updates the failure messages for proper package validation, this integration test fails because we are checking string messages that come from
pub, notwebdev. This removes validating that the messages from pub are what is expected, since we don't control those messages in the first place (and therefore shouldn't be testing them).