* Delete null key
`__` key in keymap.c doesn't actually exist on the physical hardware.
Removed key from keymap.c and removed its argument from the layout macro.
* Delete unused keycode aliases
* Replace layer index definitions with an enum
* Replace redundant numpad keycodes with native aliases
* Use native layer change keycodes instead of aliases
* Visually align the keycodes
It makes the keymap pretty.
* Correct Configurator layout data
* Clean up header files
- convert to pragma once include guard
- remove redundant definitions
- remove commented code blocks
* Delete LAYOUT_kc macro
Was copied from ergotravel; not valid for this keyboard.
* Consolidate rev1 rules.mk settings to keyboard level
Previous codebase enabled Backlight at keyboard level then disabled it at revision level.
* Delete unused rules
* Consolidate config.h settings from keymap level to keyboard level
* Modernize keyboard's config.h file
Aligns the keyboard-level config.h file more closely with the current QMK template for AVR keyboards.
