cleanup TPTP multi-patch folder

Two-phase-Two-phase/multi-patch/Archive/README

...-case-const-solution/TP-TP-layered_soil-const-solution.py

...ive/TP-TP-layered-soil-case-const-solution/run-simulation

...ion/TP-TP-layered_soil_with_inner_patch_const_solution.py

...th-inner-patch-constant-solution/debug-weird-rogue-dof.py

...il-case-with-inner-patch-constant-solution/run-simulation

...R/TP-multi-patch-with-gravity-same-wetting-phase-as-RR.py

...lus-gravity-with-same-wetting-phase-as-RR/old_geometry.py

...plus-gravity-with-same-wetting-phase-as-RR/run-simulation