refactor: elide lifetime of HeaderExtractor & HeaderInjector

Author: davidB

tracing-opentelemetry-instrumentation-sdk/src/http/opentelemetry_http.rs

@@ -3,7 +3,7 @@ use opentelemetry::propagation::{Extractor, Injector};
 // copy from crate opentelemetry-http (to not be dependants of on 3rd: http, ...)
 pub struct HeaderInjector<'a>(pub &'a mut http::HeaderMap);
 
-impl<'a> Injector for HeaderInjector<'a> {
+impl Injector for HeaderInjector<'_> {
     /// Set a key and value in the `HeaderMap`. Does nothing if the key or value are not valid inputs.
     fn set(&mut self, key: &str, value: String) {
         if let Ok(name) = http::header::HeaderName::from_bytes(key.as_bytes()) {
@@ -16,7 +16,7 @@ impl<'a> Injector for HeaderInjector<'a> {
 
 pub struct HeaderExtractor<'a>(pub &'a http::HeaderMap);
 
-impl<'a> Extractor for HeaderExtractor<'a> {
+impl Extractor for HeaderExtractor<'_> {
     /// Get a value for a key from the `HeaderMap`. If the value is not valid ASCII, returns None.
     fn get(&self, key: &str) -> Option<&str> {
         self.0.get(key).and_then(|value| value.to_str().ok())