[Extlib] remove obsolete functions (now in OCaml's stdlib)

bin/migration_scripts/titanium2vanadium.sh

src/kernel_internals/parsing/cparser.mly

src/kernel_internals/typing/asm_contracts.ml

src/kernel_internals/typing/cabs2cil.ml

src/kernel_internals/typing/infer_annotations.ml

src/kernel_internals/typing/mergecil.ml

src/kernel_internals/typing/oneret.ml

src/kernel_internals/typing/rmtmps.ml

src/kernel_internals/typing/unroll_loops.ml

src/kernel_services/abstract_interp/int_interval.ml

src/kernel_services/abstract_interp/int_val.ml

src/kernel_services/abstract_interp/ival.ml

src/kernel_services/analysis/dominators.ml

src/kernel_services/analysis/interpreted_automata.ml

src/kernel_services/analysis/logic_interp.ml

src/kernel_services/ast_data/annotations.ml

src/kernel_services/ast_data/kernel_function.ml

src/kernel_services/ast_data/property.ml

src/kernel_services/ast_printing/cil_printer.ml

src/kernel_services/ast_printing/printer.ml