Clean up anaconda repository #187

Job	Run time
Clean up anaconda packages (dppy/numba-dpex)	55s
Clean up anaconda packages (dppy/numba-mlir)	1m 12s
Clean up anaconda packages (dppy/dpnp)	1m 11s
Clean up anaconda packages (dppy/dpcpp-llvm-spirv)	59s
Clean up anaconda packages (dppy/dpbench)	59s
Clean up anaconda packages (dppy/dpctl)	59s
	6m 15s

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