Clean up anaconda repository #234

Job	Run time
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	33s
Clean up anaconda packages (dppy/numba-dpex)	57s
Clean up anaconda packages (dppy/dpctl)	1m 14s
Clean up anaconda packages (dppy/numba-mlir)	45s
Clean up anaconda packages (dppy/dpbench)	56s
Clean up anaconda packages (dppy/dpnp)	58s
	5m 23s

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