Clean up anaconda repository #258

Job	Run time
Clean up anaconda packages (dppy/numba-mlir)	57s
Clean up anaconda packages (dppy/numba-dpex)	1m 10s
Clean up anaconda packages (dppy/dpbench)	1m 19s
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	56s
Clean up anaconda packages (dppy/dpctl)	54s
Clean up anaconda packages (dppy/dpnp)	1m 3s
	6m 19s

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