Remove workarounds

[bugadani]

• embassy-rs/embassy#2014 removed by #140

• card-io-fw/src/states/measure.rs

  Line 43 in 140692c

  #[allow(suspicious_auto_trait_impls)] // SAFETY: yolo

• card-io-fw/src/board/wifi/mod.rs

  Line 264 in 6c20208

  // HACK: force polling the interface in case some write operation doesn't wake it up

  Removed by #140

• card-io-fw/Cargo.toml

  Line 147 in a6743eb

  esp-println = { git = "https://github.com/bugadani/esp-println.git", branch = "serial_jtag" }

  Unblocked by esp-rs/esp-println#55