device/pine64-pinephone: Revert 2 commits already handled by eg25-manager
This MR reverts the following 2 commits:
https://gitlab.com/postmarketOS/pmaports/-/commit/f8df0939854d19bf0eee0e84ff20a4747264c63e: device/pine64-pinephone: add additional modem udev rule for new community firmware serial (MR 3240)
https://gitlab.com/postmarketOS/pmaports/-/commit/b62d7f6e7c07a54fdeac2d012c582f6210d5d5b2: device/pine64-pinephone: add recommended modem udev rules (MR 3235)
These are already handled by 80-modem-eg25.rules in eg25-manager.