kconfig: Remove unnecessary prototypes from headers

Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 28df18d..c814f57 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -16,6 +16,11 @@
 
 #include "lkc.h"
 
+struct conf_printer {
+	void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
+	void (*print_comment)(FILE *, const char *, void *);
+};
+
 static void conf_warning(const char *fmt, ...)
 	__attribute__ ((format (printf, 1, 2)));