Remove unused imports
Remove unused imports

* wqflask/utility/Plot.py: Remove unused imports like "numarray". "numarray" is
does not have py3 support so it's important to remove references to it.

pjotrp/genenetwork2,zsloan/genenetwork2,genenetwork/genenetwork2,pjotrp/genenetwork2,genenetwork/genenetwork2,pjotrp/genenetwork2,genenetwork/genenetwork2,zsloan/genenetwork2,zsloan/genenetwork2,pjotrp/genenetwork2,genenetwork/genenetwork2,zsloan/genenetwork2,pjotrp/genenetwork2