Remove includes of obsoleted files
Remove includes of obsoleted files

Most 'to_s' type functions are now provided in C code for all languages.

openSUSE/sat-solver-bindings,openSUSE/sat-solver-bindings,openSUSE/sat-solver-bindings,openSUSE/sat-solver-bindings,openSUSE/sat-solver-bindings,openSUSE/sat-solver-bindings