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Clean up anaconda repository #559

Job	Run time
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	55s
Clean up anaconda packages (dppy/numba-mlir)	1m 4s
Clean up anaconda packages (dppy/numba-dpex)	58s
Clean up anaconda packages (dppy/dpbench)	1m 14s
Clean up anaconda packages (dppy/dpctl)	1m 7s
Clean up anaconda packages (dppy/dpnp)	1m 4s
	6m 22s