[addons] remove dead code on CAddonDll

[AlwinEsch]

There are two functions in CAddonDll include who not present.

Description

Unused entries becomes removed with them.

Motivation and Context

Cleanup

How Has This Been Tested?

It compile ;)

Types of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the Code guidelines of this project
• My change requires a change to the documentation, either Doxygen or wiki
• I have updated the documentation accordingly
• I have read the CONTRIBUTING document
• I have added tests to cover my change
• All new and existing tests passed

[AlwinEsch]

jenkins build this please