chip-repl: Remove stale comment and validation #91767

Job	Run time
Build on Darwin (clang, python_lib, simulated)	1h 6m 42s
Build on Darwin (clang, python_lib, simulated)	1h 6m 42s
Build on Linux (fake, gcc_release, clang, simulated)	1h 29m 55s
Build on Linux (fake, gcc_release, clang, simulated)	1h 29m 55s
Build on Linux (coverage)	9m 38s
Build on Linux (coverage)	10m 34s
Build on Linux (gcc_debug)	50m 42s
Build on Linux (gcc_debug)	50m 42s
Build on Linux (python_lib)	20m 15s
Build on Linux (python_lib)	20m 15s
Build on Linux (python lighting-app)	7m 20s
Build on Linux (python lighting-app)	7m 20s
	8h 10m 0s

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