updated grid weights; removed stale files

active-crust/grid/gk/adaptive/rate-tree.json

active-crust/grid/gk/fixed/rate-tree.json

active-crust/grid/gk/tree-info.json

active-crust/grid/nn/adaptive/rate-tree.json

active-crust/grid/nn/fixed/rate-tree.json

active-crust/grid/nn/tree-info.json

active-crust/grid/r85/adaptive/rate-tree.json

active-crust/grid/r85/fixed/rate-tree.json

active-crust/grid/r85/tree-info.json

subduction/slab/interface/gk/source-tree.json

subduction/slab/interface/nn/source-tree.json

subduction/slab/interface/r85/source-tree.json

subduction/slab/interface/source-tree.json

subduction/slab/mfd-map-all.json

subduction/slab/slab/gk/source-tree.json

subduction/slab/slab/nn/source-tree.json

subduction/slab/slab/r85/source-tree.json

subduction/slab/slab/source-tree.json