Remove lmdb #119

Job	Run time
build (ubuntu-latest, 1.66.0)	4m 33s
build (ubuntu-latest, stable)	45s
build (ubuntu-latest, beta)	47s
build (ubuntu-latest, nightly)	46s
build (macos-latest, 1.66.0)	7m 2s
build (macos-latest, stable)	2m 8s
build (macos-latest, beta)	2m 14s
build (macos-latest, nightly)	1m 34s
build (windows-latest, -x86_64-pc-windows-msvc, 1.66.0)	5m 50s
build (windows-latest, -x86_64-pc-windows-msvc, stable)	1m 47s
build (windows-latest, -x86_64-pc-windows-msvc, beta)	1m 45s
build (windows-latest, -x86_64-pc-windows-msvc, nightly)	1m 32s
build (windows-latest, -i686-pc-windows-msvc, 1.66.0)	6m 22s
build (windows-latest, -i686-pc-windows-msvc, stable)	1m 27s
build (windows-latest, -i686-pc-windows-msvc, beta)	1m 41s
build (windows-latest, -i686-pc-windows-msvc, nightly)	1m 46s
	41m 59s

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