feat(factor-otel): updating WIT and conversions

Signed-off-by: Andrew Steurer <[email protected]>

Author: asteurer

crates/factor-otel/src/host.rs

@@ -1,5 +1,4 @@
-use std::fmt::format;
-
+use crate::InstanceState;
 use anyhow::anyhow;
 use anyhow::Result;
 use opentelemetry::trace::TraceContextExt;
@@ -9,8 +8,6 @@ use opentelemetry_sdk::trace::SpanProcessor;
 use spin_world::wasi;
 use tracing_opentelemetry::OpenTelemetrySpanExt;
 
-use crate::InstanceState;
-
 impl wasi::otel::tracing::Host for InstanceState {
     async fn on_start(&mut self, context: wasi::otel::tracing::SpanContext) -> Result<()> {
         let mut state = self.state.write().unwrap();