sparc/console: kill off obsolete declarations

commit 09d3f3f0 ("sparc: Kill PROM console driver.") missed removing
the declarations of the deleted prom_con structure and prom_con_init
function from console.h. Kill them off now.
Signed-off-by: NArvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/console.h

@@ -101,7 +101,6 @@ extern const struct consw *conswitchp;
 extern const struct consw dummy_con;	/* dummy console buffer */
 extern const struct consw vga_con;	/* VGA text console */
 extern const struct consw newport_con;	/* SGI Newport console  */
-extern const struct consw prom_con;	/* SPARC PROM console */
 
 int con_is_bound(const struct consw *csw);
 int do_unregister_con_driver(const struct consw *csw);
@@ -201,7 +200,6 @@ extern void suspend_console(void);
 extern void resume_console(void);
 
 int mda_console_init(void);
-void prom_con_init(void);
 
 void vcs_make_sysfs(int index);
 void vcs_remove_sysfs(int index);