Clean up anaconda repository #527

Job	Run time
Clean up anaconda packages (dppy/numba-mlir)	45s
Clean up anaconda packages (dppy/dpctl)	39s
Clean up anaconda packages (dppy/dpbench)	40s
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	1m 26s
Clean up anaconda packages (dppy/dpnp)	57s
Clean up anaconda packages (dppy/numba-dpex)	1m 17s
	5m 44s

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