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Clean up anaconda repository #566

Job	Run time
Clean up anaconda packages (dppy/dpnp)	57s
Clean up anaconda packages (dppy/numba-mlir)	48s
Clean up anaconda packages (dppy/dpbench)	49s
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	1m 3s
Clean up anaconda packages (dppy/dpctl)	1m 1s
Clean up anaconda packages (dppy/numba-dpex)	43s
	5m 21s