clean up generate-api errors

keyboards/ergotravel/info.json

@@ -4,6 +4,7 @@
   "identifier": "0x1256",
   "url": "https://github.com/jpconstantineau/ErgoTravel",
   "maintainer": "qmk",
+  "bootloader": "caterina",
   "processor": "atmega32u4",
   "width": 16,
   "height": 5,

keyboards/ergotravel/rules.mk

@@ -1,16 +1,3 @@
-# MCU name
-MCU = atmega32u4
-
-# Bootloader selection
-#   Teensy       halfkay
-#   Pro Micro    caterina
-#   Atmel DFU    atmel-dfu
-#   LUFA DFU     lufa-dfu
-#   QMK DFU      qmk-dfu
-#   ATmega32A    bootloadHID
-#   ATmega328P   USBasp
-BOOTLOADER = caterina
-
 # Build Options
 #   change to "no" to disable the options, or define them in the Makefile in
 #   the appropriate keymap folder that will get included automatically
@@ -32,4 +19,4 @@ SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
 
 SPLIT_KEYBOARD = yes
 
-DEFAULT_FOLDER = ergotravel/rev1
+DEFAULT_FOLDER = ergotravel/rev1