Remove h8300_print_float_info

Remove h8300_print_float_info

In infcmd.c:print_float_info, if the architecture doesn't have gdbarch
method print_float_info implemented and doesn't float reggroup, GDB
will prints "No floating-point info available for this processor."
The h8300 port doesn't have float registers, and don't need to
implement print_float_info.  This patch is to remove it.

gdb:

2014-12-18  Yao Qi  <yao@codesourcery.com>

	* h8300-tdep.c (h8300_print_float_info): Remove.
	(h8300_gdbarch_init): Remove the call to
	set_gdbarch_print_float_info.