tty/vt: consolemap: remove extern from function decls

The extern keyword is not needed for function declarations. Remove it,
so that the consolemap header conforms to other tty headers.
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220607104946.18710-5-jslaby@suse.czSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/consolemap.h

@@ -17,12 +17,11 @@
 #ifdef CONFIG_CONSOLE_TRANSLATIONS
 struct vc_data;
 
-extern u16 inverse_translate(const struct vc_data *conp, int glyph,
-		int use_unicode);
-extern unsigned short *set_translate(int m, struct vc_data *vc);
-extern int conv_uni_to_pc(struct vc_data *conp, long ucs);
-extern u32 conv_8bit_to_uni(unsigned char c);
-extern int conv_uni_to_8bit(u32 uni);
+u16 inverse_translate(const struct vc_data *conp, int glyph, int use_unicode);
+unsigned short *set_translate(int m, struct vc_data *vc);
+int conv_uni_to_pc(struct vc_data *conp, long ucs);
+u32 conv_8bit_to_uni(unsigned char c);
+int conv_uni_to_8bit(u32 uni);
 void console_map_init(void);
 #else
 #define inverse_translate(conp, glyph, uni) ((uint16_t)glyph)