Remove documentation for asynchronous instruments

Author: utpilla

opentelemetry/src/metrics/instruments/counter.rs

@@ -33,8 +33,6 @@ impl<T> Counter<T> {
 }
 
 /// An async instrument that records increasing values.
-///
-/// [`ObservableCounter`] can be cloned to create multiple handles to the same instrument. Avoid creating duplicate [`ObservableCounter`]s for the same instrument.
 #[derive(Clone)]
 #[non_exhaustive]
 pub struct ObservableCounter<T> {

opentelemetry/src/metrics/instruments/gauge.rs

@@ -33,8 +33,6 @@ impl<T> Gauge<T> {
 }
 
 /// An async instrument that records independent readings.
-///
-/// [`ObservableGauge`] can be cloned to create multiple handles to the same instrument. Avoid creating duplicate [`ObservableGauge`]s for the same instrument.
 #[derive(Clone)]
 #[non_exhaustive]
 pub struct ObservableGauge<T> {

opentelemetry/src/metrics/instruments/up_down_counter.rs

@@ -36,8 +36,6 @@ impl<T> UpDownCounter<T> {
 }
 
 /// An async instrument that records increasing or decreasing values.
-///
-/// [`ObservableUpDownCounter`] can be cloned to create multiple handles to the same instrument. Avoid creating duplicate [`ObservableUpDownCounter`]s for the same instrument.
 #[derive(Clone)]
 #[non_exhaustive]
 pub struct ObservableUpDownCounter<T> {

opentelemetry/src/metrics/meter.rs

@@ -329,8 +329,6 @@ impl Meter {
     }
 
     /// creates an instrument builder for recording increasing values via callback.
-    ///
-    /// [`ObservableCounter`] can be cloned to create multiple handles to the same instrument. Avoid creating duplicate [`ObservableCounter`]s for the same instrument.
     pub fn u64_observable_counter(
         &self,
         name: impl Into<Cow<'static, str>>,
@@ -339,8 +337,6 @@ impl Meter {
     }
 
     /// creates an instrument builder for recording increasing values via callback.
-    ///
-    /// [`ObservableCounter`] can be cloned to create multiple handles to the same instrument. Avoid creating duplicate [`ObservableCounter`]s for the same instrument.
     pub fn f64_observable_counter(
         &self,
         name: impl Into<Cow<'static, str>>,
@@ -369,8 +365,6 @@ impl Meter {
     }
 
     /// creates an instrument builder for recording changes of a value via callback.
-    ///
-    /// [`ObservableUpDownCounter`] can be cloned to create multiple handles to the same instrument. Avoid creating duplicate [`ObservableUpDownCounter`]s for the same instrument.
     pub fn i64_observable_up_down_counter(
         &self,
         name: impl Into<Cow<'static, str>>,
@@ -379,8 +373,6 @@ impl Meter {
     }
 
     /// creates an instrument builder for recording changes of a value via callback.
-    ///
-    /// [`ObservableUpDownCounter`] can be cloned to create multiple handles to the same instrument. Avoid creating duplicate [`ObservableUpDownCounter`]s for the same instrument.
     pub fn f64_observable_up_down_counter(
         &self,
         name: impl Into<Cow<'static, str>>,
@@ -419,8 +411,6 @@ impl Meter {
     }
 
     /// creates an instrument builder for recording the current value via callback.
-    ///
-    /// [`ObservableGauge`] can be cloned to create multiple handles to the same instrument. Avoid creating duplicate [`ObservableGauge`]s for the same instrument.
     pub fn u64_observable_gauge(
         &self,
         name: impl Into<Cow<'static, str>>,
@@ -429,8 +419,6 @@ impl Meter {
     }
 
     /// creates an instrument builder for recording the current value via callback.
-    ///
-    /// [`ObservableGauge`] can be cloned to create multiple handles to the same instrument. Avoid creating duplicate [`ObservableGauge`]s for the same instrument.
     pub fn i64_observable_gauge(
         &self,
         name: impl Into<Cow<'static, str>>,
@@ -439,8 +427,6 @@ impl Meter {
     }
 
     /// creates an instrument builder for recording the current value via callback.
-    ///
-    /// [`ObservableGauge`] can be cloned to create multiple handles to the same instrument. Avoid creating duplicate [`ObservableGauge`]s for the same instrument.
     pub fn f64_observable_gauge(
         &self,
         name: impl Into<Cow<'static, str>>,