Remove some unnecessary token pasting macrology

Ondřej Surý requested to merge ondrej-cleanup-mem-macros into main

There used to be an extra layer of indirection in the memory functions for certain dynamic linking scenarios. This involved variant spellings like isc__mem and isc___mem. The isc___mem variants were removed in commit 7de84697 so the token pasting is no longer needed and only serves to obfuscate.

Merge request reports