Remove custom 8MB partitions and config

Delete partitions_8MB_logging.csv and remove the board_build.partitions reference from platformio.ini. This makes PlatformIO fall back to the default partition table and removes the project-specific 8MB logging partition configuration.

Author: zjwhitehead

partitions_8MB_logging.csv

@@ -25,7 +25,6 @@ platform = espressif32@6.12.0
 board = m5stack-stamps3
 framework = arduino
 src_folder = sp140
-board_build.partitions = partitions_8MB_logging.csv
 ; If esptool.py complains about missing intelhex, install into the tool package:
 ;   ~/.platformio/penv/bin/python -m pip install intelhex -t ~/.platformio/packages/tool-esptoolpy
 extra_scripts =