remove unused JTAG_END_STATE

src/jtag/amt_jtagaccel.c

src/jtag/arm-jtag-ew.c

src/jtag/bitbang.c

src/jtag/bitq.c

src/jtag/gw16012.c

src/jtag/jlink.c

src/jtag/rlink/rlink.c

src/jtag/usbprog.c

src/jtag/vsllink.c