Clean up anaconda repository #424

Job	Run time
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	1m 5s
Clean up anaconda packages (dppy/numba-dpex)	49s
Clean up anaconda packages (dppy/numba-mlir)	1m 9s
Clean up anaconda packages (dppy/dpctl)	56s
Clean up anaconda packages (dppy/dpnp)	1m 8s
Clean up anaconda packages (dppy/dpbench)	46s
	5m 53s

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