Removing Custom Entity mappings, these have not been used for years.

[shainw]

Change(s):

• Removed custom entity mappings

Reason for Change(s):

• Not needed, has not been used for years

Version Updated:

• Yes

Testing Completed:

• Yes

Checked that the validations are passing and have addressed any issues that are present:

• Yes

[contentautomationbot]

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