* data/bison.simple: Remove unnecessary commentary and white

space differences from 1_29-branch.
Depend on YYERROR_VERBOSE, not defined (YYERROR_VERBOSE).

(union yyalloc, YYSTACK_GAP_MAX, YYSTACK_BYTES, YYCOPY,
YYSTACK_RELOCATE): Do not define if yyoverflow is defined, or
if this is a C++ parser and YYSTYPE or YYLTYPE has nontrivial
constructors or destructors.

(yyparse) [! defined YYSTACK_RELOCATE]: Do not relocate the stack.