Remove superfluous JTAG disable code (#6445)

* Remove superfluous JTAG disable code

* 32A has differently named register

* Accidentally some operators

* 32A also has different JTAG pins

* Wrap disable_jtag() in an ifndef

* Document this new define

* Rename the define, it conflicts with a LUFA thing

Also, move the ifndef wrapping to the call in keyboard_setup()

keyboards/vitamins_included/matrix.c

@@ -136,12 +136,6 @@ bool has_usb(void) {
 
 void matrix_init(void)
 {
-#ifdef DISABLE_JTAG
-  // JTAG disable for PORT F. write JTD bit twice within four cycles.
-  MCUCR |= (1<<JTD);
-  MCUCR |= (1<<JTD);
-#endif
-
     // initialize row and col
 #if (DIODE_DIRECTION == COL2ROW)
     unselect_rows();

keyboards/vitamins_included/rev1/rev1.h

@@ -1,6 +1,5 @@
 #ifndef REV1_H
 #define REV1_H
-#define DISABLE_JTAG // The keyboard uses PF4, PF5 and PF7, which are used by JTAG.
 #define EE_HANDS // This isn't optional for the vitamins included
 
 #include QMK_KEYBOARD_H