[kernel] Removes loop pragma WIDEN_VARIABLES and WIDEN_HINTS.

src/kernel_internals/parsing/logic_parser.mly

src/kernel_internals/typing/unroll_loops.ml

src/kernel_services/analysis/logic_deps.ml

src/kernel_services/ast_data/cil_types.ml

src/kernel_services/ast_printing/cil_printer.ml

src/kernel_services/ast_printing/cil_types_debug.ml

src/kernel_services/ast_printing/logic_print.ml

src/kernel_services/ast_queries/ast_diff.ml

src/kernel_services/ast_queries/cil.ml

src/kernel_services/ast_queries/logic_typing.ml

src/kernel_services/ast_queries/logic_utils.ml

src/kernel_services/parsetree/logic_ptree.ml