Unused functions in GenCode

[demeritcowboy]

Overview

I can't see where these functions are used. Came up while reviewing a PR.

[civibot]

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[eileenmcnaughton]

I reached the same conclusion grepping. In addition I found this change makes this unused

CRM_Core_CodeGen_Util_File::digestAll

Removing functions used in the gencode process would have caused tests to fail - but test fail is unrelated.

[demeritcowboy]

Thanks. Yes to digestAll() and hmm... looks like findCoreSourceDir() too!