Removed some unnecessary things that broke BeOS builds.

configure.in

@@ -201,8 +201,8 @@ AC_HEADER_STDC
 AC_CHECK_HEADERS([stdlib.h string.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
-AC_C_CONST
-AC_TYPE_SIZE_T
+dnl AC_C_CONST
+dnl AC_TYPE_SIZE_T
 
 # Checks for library functions.