Clean up anaconda repository #289

Job	Run time
Clean up anaconda packages (dppy/numba-dpex)	1m 13s
Clean up anaconda packages (dppy/dpctl)	1m 12s
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	1m 5s
Clean up anaconda packages (dppy/dpbench)	1m 19s
Clean up anaconda packages (dppy/numba-mlir)	55s
Clean up anaconda packages (dppy/dpnp)	1m 8s
	6m 52s

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