Don't remove all equivalences when removing a variable from a component.
Don't remove all equivalences when removing a variable from a component.

nickerso/libcellml,cellml/libcellml,cellml/libcellml,nickerso/libcellml,cellml/libcellml,nickerso/libcellml,cellml/libcellml,nickerso/libcellml,hsorby/libcellml,hsorby/libcellml,hsorby/libcellml,hsorby/libcellml