Remove J-Link and DFU instructions not used for v2

Author: bbogush

README.md

@@ -57,15 +57,7 @@ Linux based OS
 - git clone https://github.com/bbogush/nand_programmer.git
 - cd nand_programmer/firmware
 - make
-## Burn firmware
-### JTAG (J-Link)
-- connect JTAG (J-Link) to board.
-- sudo apt-get install openocd
-- cd ~/dev/nand_programmer/nand_programmer/firmware
-- chmod +x ../extra/program.sh
-- make program
-- NOTE: first time flash of chip should be burnt via internal bootloader (DFU )because JTAG interface is not active.
-### SWD (ST-Link)
+## Burn firmware via SWD (ST-Link)
 - sudo apt-get install libusb-1.0-0-dev
 - cd ~/dev/
 - git clone https://github.com/texane/stlink.git
@@ -79,12 +71,6 @@ Linux based OS
 - connect ST-Link to board
 - cd ~/dev/nand_programmer/nand_programmer/firmware
 - st-flash write ./obj/prog.bin 0x8000000
-## Burn firmware (internal bootloader)
-- download STM DFU programmer software.
-- set BOOT0 switch to 1 to start internal bootloader.
-- connect board to PC via USB interface.
-- flash firmware.
-- set BOOT0 switch to 0 to boot from flash.
 ## Build host application
 - Install Qt5.5.1
 - Open ~/dev/nand_programmer/nand_programmer/qt/qt.pro with QtCreator.