Remove unused C++ BMN FF #7453

Job	Run time
Packaging: Config file (ubuntu-latest, linked)	1m 32s
Packaging: Config file (windows-latest, linked)	2m 42s
Packaging: Config file (macos-latest, default)	1m 14s
Packaging: Config file (macos-latest, linked)	1m 35s
Packaging: Config file (windows-latest, default)	3m 43s
Packaging: Config file (macos-latest, nightly-latest)	1m 13s
Packaging: Config file (windows-latest, nightly-latest)	4m 15s
Packaging: Config file (ubuntu-latest, nightly-latest)	1m 23s
Packaging: Config file (ubuntu-latest, default)	1m 17s
	18m 54s

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