21.9: removing unused functions

Nicholas Stylesrequested to merge
nstyles/athena:21.9-ATLITKSW-80 into 21.9

removing unused functions that were causing compiler warnings due to potentially returning local addresses (ATLITKSW-80)

Closes ATLITKSW-80.

FYI @asalzbur @npetters @lmijovic @goblirsc @nova @fcostanz

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