fix(mce_builder): deleted alias

[vlavorini]

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• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
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[jjoyce0510]

LGTM. Was this causing trouble on your side?

[vlavorini]

Yes, while emitting lineage info from an Airflow job, example:

from datahub_provider.entities import Dataset

@task(inlets={"datasets": [Dataset(...)]},
       outlets=AUTO)
def that_task():
    ...

The class Dataset in fact uses a function defined in that builder, hence the issue came out.

[shirshanka]

LGTM