Clean up anaconda repository #460

Job	Run time
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	1m 33s
Clean up anaconda packages (dppy/dpnp)	47s
Clean up anaconda packages (dppy/dpbench)	33s
Clean up anaconda packages (dppy/numba-dpex)	49s
Clean up anaconda packages (dppy/dpctl)	1m 0s
Clean up anaconda packages (dppy/numba-mlir)	43s
	5m 25s

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