re-organize this code so it doesn't give my computer fits

Author: jepler

ports/atmel-samd/common-hal/microcontroller/Pin.c

@@ -161,12 +161,11 @@ bool pin_number_is_free(uint8_t pin_number) {
             return false;
         }
         if (pin_number == PIN_PA30
-            #ifdef SAM_D5X_E5X
-            ) {
-            #endif
             #ifdef SAMD21
-            || pin_number == PIN_PA31) {
-            #endif) {
+            || pin_number == PIN_PA31
+            #endif
+            )
+            {
             return state->bit.PMUXEN == 1 && ((pmux->reg >> (4 * pin_index % 2)) & 0xf) == SWD_MUX;
         }
     }