Clean up anaconda repository #420

Job	Run time
Clean up anaconda packages (dppy/numba-dpex)	47s
Clean up anaconda packages (dppy/numba-mlir)	56s
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	53s
Clean up anaconda packages (dppy/dpctl)	55s
Clean up anaconda packages (dppy/dpnp)	36s
Clean up anaconda packages (dppy/dpbench)	42s
	4m 49s

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