matplotlib: remove unnecessary numpy resource
matplotlib: remove unnecessary numpy resource

already depends on the numpy formula in core

Closes #5163.

Signed-off-by: Jonathan Chang <0bd51b8a224feeddb634965eebae512adcd49a8d@gmail.com>

quantumsteve/homebrew-science,dpo/homebrew-science,andrewjpage/homebrew-science,heuermh/homebrew-science,pditommaso/homebrew-science,maplesond/homebrew-science,philippbayer/homebrew-science