Remove Z3_bool, Z3_TRUE, Z3_FALSE from the API.

These have just been aliases for the standard type `bool` and
values `true` and `false` for a long time now.

src/api/z3_api.h

@@ -75,11 +75,6 @@ DEFINE_TYPE(Z3_rcf_num);
    - \c Z3_stats: statistical data for a solver.
 */
 
-/**
-   \brief Z3 Boolean type. It is just an alias for \c bool.
-*/
-typedef bool Z3_bool;
-
 /**
    \brief Z3 string type. It is just an alias for \ccode{const char *}.
 */
@@ -87,16 +82,6 @@ typedef const char * Z3_string;
 typedef char const*  Z3_char_ptr;
 typedef Z3_string * Z3_string_ptr;
 
-/**
-   \brief True value. It is just an alias for \c true.
-*/
-#define Z3_TRUE  true
-
-/**
-   \brief False value. It is just an alias for \c false.
-*/
-#define Z3_FALSE false
-
 /**
    \brief Lifted Boolean type: \c false, \c undefined, \c true.
 */