cleanup main and network state handling

rust/src/webserver/webserver.rs

@@ -2,7 +2,7 @@
 
 use crate::{
     determine_tank_state, get_version, log::LogMessage, plant_hal::PLANT_COUNT,
-    plant_state::PlantState, util::LimitPrecision, BOARD_ACCESS,
+    plant_state::PlantState, BOARD_ACCESS,
 };
 use anyhow::bail;
 use chrono::DateTime;
@@ -273,7 +273,7 @@ fn tank_info(
     //should be multsampled
     let water_temp = board.water_temperature_c();
     Ok(Some(serde_json::to_string(
-        &tank_info.as_mqtt_info(&config.tank, water_temp),
+        &tank_info.as_mqtt_info(&config.tank, &water_temp),
     )?))
 }