Clean up anaconda repository #388

Job	Run time
Clean up anaconda packages (dppy/dpctl)	1m 15s
Clean up anaconda packages (dppy/dpbench)	59s
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	1m 8s
Clean up anaconda packages (dppy/numba-dpex)	1m 1s
Clean up anaconda packages (dppy/numba-mlir)	1m 11s
Clean up anaconda packages (dppy/dpnp)	1m 12s
	6m 46s

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