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Clean up anaconda repository #569

Job	Run time
Clean up anaconda packages (dppy/dpctl)	58s
Clean up anaconda packages (dppy/dpbench)	56s
Clean up anaconda packages (dppy/dpnp)	56s
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	1m 0s
Clean up anaconda packages (dppy/numba-dpex)	45s
Clean up anaconda packages (dppy/numba-mlir)	58s
	5m 33s