Remove warning `package is empty`

[lars-reimann]

Is your feature request related to a problem?

The warning package is empty is always shown when the error package is missing is shown.

Desired solution

• Remove the warning. It's a leftover from when we still had import xy imports.
• Change the error message to The package xy is empty.

Possible alternatives (optional)

No response

Screenshots (optional)

No response

Additional Context (optional)

No response

[lars-reimann]

:tada: This issue has been resolved in version 0.15.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• npm package (@latest dist-tag)
• v0.15.0
• GitHub release

Your semantic-release bot :package::rocket: