Clean up anaconda repository #447

Job	Run time
Clean up anaconda packages (dppy/numba-dpex)	50s
Clean up anaconda packages (dppy/numba-mlir)	43s
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	52s
Clean up anaconda packages (dppy/dpbench)	47s
Clean up anaconda packages (dppy/dpnp)	53s
Clean up anaconda packages (dppy/dpctl)	41s
	4m 46s

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