Align docs to new-keyboard behaviour (#16357)

docs/index.html

@@ -39,7 +39,6 @@
         '/glossary': '/reference_glossary',
         '/key_lock': '/feature_key_lock',
         '/make_instructions': '/getting_started_make_guide',
-        '/porting_your_keyboard_to_qmk': '/hardware_avr',
         '/space_cadet_shift': '/feature_space_cadet_shift',
         '/getting_started_getting_help': '/support',
         '/tap_dance': '/feature_tap_dance',