Remove unused functions from null_main.c and null_input.c

Sys_mkdir is suppose to have a capital M, which is also in null_main.c.

code/null/null_input.c

@@ -32,6 +32,3 @@ void IN_Shutdown( void ) {
 void IN_Restart( void ) {
 }
 
-void Sys_SendKeyEvents (void) {
-}
-

code/null/null_main.c

@@ -19,7 +19,7 @@ along with Quake III Arena source code; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 ===========================================================================
 */
-// sys_null.h -- null system driver to aid porting efforts
+// null_main.c -- null system driver to aid porting efforts
 
 #include <errno.h>
 #include <stdio.h>
@@ -30,26 +30,6 @@ int			sys_curtime;
 
 //===================================================================
 
-void Sys_BeginStreamedFile( FILE *f, int readAhead ) {
-}
-
-void Sys_EndStreamedFile( FILE *f ) {
-}
-
-int Sys_StreamedRead( void *buffer, int size, int count, FILE *f ) {
-	return fread( buffer, size, count, f );
-}
-
-void Sys_StreamSeek( FILE *f, int offset, int origin ) {
-	fseek( f, offset, origin );
-}
-
-
-//===================================================================
-
-
-void Sys_mkdir ( const char *path ) {
-}
 
 void Sys_Error (char *error, ...) {
 	va_list		argptr;
@@ -67,13 +47,6 @@ void Sys_Quit (void) {
 	exit (0);
 }
 
-void	Sys_UnloadGame (void) {
-}
-
-void	*Sys_GetGameAPI (void *parms) {
-	return NULL;
-}
-
 char *Sys_GetClipboardData( void ) {
 	return NULL;
 }
@@ -89,26 +62,10 @@ FILE	*Sys_FOpen(const char *ospath, const char *mode) {
 void	Sys_Mkdir (char *path) {
 }
 
-char	*Sys_FindFirst (char *path, unsigned musthave, unsigned canthave) {
-	return NULL;
-}
-
-char	*Sys_FindNext (unsigned musthave, unsigned canthave) {
-	return NULL;
-}
-
-void	Sys_FindClose (void) {
-}
-
 void	Sys_Init (void) {
 }
 
 
-void	Sys_EarlyOutput( char *string ) {
-	printf( "%s", string );
-}
-
-
 void main (int argc, char **argv) {
 	Com_Init (argc, argv);