Remove superfluous extern for non-existant global variable.

git-svn-id: svn://svn.berlios.de/openocd/trunk@2160 b42882b7-edfa-0310-969c-e2dbd0fdcd60

src/jtag/jtag.h

@@ -266,8 +266,6 @@ int jtag_get_speed(void);
  */
 int jtag_set_speed(int speed);
 
-extern int jtag_speed_post_reset;
-
 enum reset_types {
 	RESET_NONE            = 0x0,
 	RESET_HAS_TRST        = 0x1,