cli: fix all compiler warnings and remove dead code #189

Job	Run time
Configuration Coverage	7m 8s
Runtime Smoke Checks	3m 43s
Standalone Package Export Check	4m 33s
Build (gcc)	3m 40s
Build (clang)	4m 14s
Static Analysis	8m 11s
Valgrind Checks	3m 55s
CLI Strict CI Summary	3s
	35m 27s

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