circle-ci: remove caching as it is only used for dependencies
circle-ci: remove caching as it is only used for dependencies

yantrabuddhi/atomspace,AmeBel/atomspace,rTreutlein/atomspace,inflector/atomspace,yantrabuddhi/atomspace,misgeatgit/atomspace,rTreutlein/atomspace,AmeBel/atomspace,ceefour/atomspace,AmeBel/atomspace,ceefour/atomspace,yantrabuddhi/atomspace,misgeatgit/atomspace,misgeatgit/atomspace,inflector/atomspace,inflector/atomspace,ArvinPan/atomspace,inflector/atomspace,misgeatgit/atomspace,rodsol/atomspace,yantrabuddhi/atomspace,rodsol/atomspace,ArvinPan/atomspace,ArvinPan/atomspace,rTreutlein/atomspace,inflector/atomspace,ceefour/atomspace,misgeatgit/atomspace,ArvinPan/atomspace,ceefour/atomspace,AmeBel/atomspace,rodsol/atomspace,yantrabuddhi/atomspace,AmeBel/atomspace,rTreutlein/atomspace,rTreutlein/atomspace,rodsol/atomspace