Drop deprecated package management commands

[ivankravets]

Drop deprecated package management commands in favor of https://docs.platformio.org/en/latest/core/userguide/pkg/index.html

• https://docs.platformio.org/en/latest/core/userguide/lib/index.html
• https://docs.platformio.org/en/latest/core/userguide/platforms/index.html
• https://docs.platformio.org/en/latest/core/userguide/cmd_update.html