Do not allow input devices to write to command buffer

Input devices should send key events and nothing more. The ability to
add commands into the input buffer was used by the joystick code
(removed long time ago) and as a dirty hack to work around limitations
of DirectInput.

src/backends/generic/header/input.h

@@ -61,11 +61,6 @@ void IN_BackendInit(in_state_t *in_state_p);
  */
 void IN_BackendShutdown(void);
 
-/*
- * Shuts the input backend down
- */
-void IN_BackendMouseButtons(void);
-
 /*
  * Move handling
  */

src/backends/generic/vid.c

@@ -264,12 +264,6 @@ IN_Shutdown(void)
 	IN_BackendShutdown();
 }
 
-void
-IN_Commands(void)
-{
-	IN_BackendMouseButtons();
-}
-
 void
 IN_Move(usercmd_t *cmd)
 {

src/backends/sdl/input.c

@@ -445,16 +445,6 @@ IN_Update(void)
 	}
 }
  
-/*
- * SDL does all the mouse button processing for
- * us. Thus no need for this functions, it's
- * just here to satisfy the frontend.
- */
-void
-IN_BackendMouseButtons(void)
-{
-}
- 
 /*
  * Move handling
  */

src/client/cl_main.c

@@ -725,9 +725,6 @@ CL_SendCommand(void)
 	/* get new key events */
 	Sys_SendKeyEvents();
 
-	/* allow mice or other external controllers to add commands */
-	IN_Commands();
-
 	/* process console commands */
 	Cbuf_Execute();
 

src/client/header/input.h

@@ -29,10 +29,6 @@
 #define CL_HEADER_INPUT_H
 
 void IN_Shutdown (void);
-
-/* oportunity for devices to stick commands on the script buffer */
-void IN_Commands (void);
-
 void IN_Frame (void);
 
 /* add additional movement on top of the keyboard move cmd */