Remove unused solvers, rely solely on vectorized numpy and c++ linear solver
Remove unused solvers, rely solely on vectorized numpy and c++ linear solver

amandalund/openmc,walshjon/openmc,smharper/openmc,paulromano/openmc,shikhar413/openmc,shikhar413/openmc,shikhar413/openmc,wbinventor/openmc,walshjon/openmc,amandalund/openmc,paulromano/openmc,amandalund/openmc,mit-crpg/openmc,smharper/openmc,wbinventor/openmc,smharper/openmc,wbinventor/openmc,mit-crpg/openmc,liangjg/openmc,paulromano/openmc,shikhar413/openmc,liangjg/openmc,amandalund/openmc,smharper/openmc,walshjon/openmc,mit-crpg/openmc,paulromano/openmc,mit-crpg/openmc,walshjon/openmc,wbinventor/openmc,liangjg/openmc,liangjg/openmc