Channel class cleanup #2285

Job	Run time
macOS [UBSAN] [lmdb \| clang]	35m 43s
Linux [UBSAN] [lmdb \| clang]	43m 44s
macOS [ASAN] [lmdb \| clang]	30m 1s
Linux [ASAN] [lmdb \| clang]	40m 57s
macOS [TSAN] [lmdb \| clang]	36m 18s
macOS [UBSAN] [rocksdb \| clang]	49m 55s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	41m 35s
macOS [ASAN] [rocksdb \| clang]	43m 26s
Linux [TSAN] [lmdb \| clang]	42m 27s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	40m 38s
macOS [TSAN] [rocksdb \| clang]	1h 1m 52s
Linux [UBSAN] [rocksdb \| clang]	54m 46s
Linux [ASAN] [rocksdb \| clang]	58m 30s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	1h 0m 23s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	55m 44s
	11h 35m 59s

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