Clean up anaconda repository #466

Job	Run time
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	1m 9s
Clean up anaconda packages (dppy/dpnp)	1m 6s
Clean up anaconda packages (dppy/dpctl)	49s
Clean up anaconda packages (dppy/numba-mlir)	46s
Clean up anaconda packages (dppy/dpbench)	58s
Clean up anaconda packages (dppy/numba-dpex)	1m 4s
	5m 52s

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