Clean up anaconda repository #444

Job	Run time
Clean up anaconda packages (dppy/numba-mlir)	48s
Clean up anaconda packages (dppy/numba-dpex)	52s
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	42s
Clean up anaconda packages (dppy/dpctl)	1m 4s
Clean up anaconda packages (dppy/dpbench)	51s
Clean up anaconda packages (dppy/dpnp)	57s
	5m 14s

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