Minor refactoring (#1839)

Author: utpilla

stress/src/metrics_counter.rs

@@ -16,7 +16,7 @@ use rand::{
     rngs::{self},
     Rng, SeedableRng,
 };
-use std::{borrow::Cow, cell::RefCell};
+use std::cell::RefCell;
 
 mod throughput;
 
@@ -28,10 +28,7 @@ lazy_static! {
         "value1", "value2", "value3", "value4", "value5", "value6", "value7", "value8", "value9",
         "value10"
     ];
-    static ref COUNTER: Counter<u64> = PROVIDER
-        .meter(<&str as Into<Cow<'static, str>>>::into("test"))
-        .u64_counter("hello")
-        .init();
+    static ref COUNTER: Counter<u64> = PROVIDER.meter("test").u64_counter("hello").init();
 }
 
 thread_local! {

stress/src/metrics_histogram.rs

@@ -16,7 +16,7 @@ use rand::{
     rngs::{self},
     Rng, SeedableRng,
 };
-use std::{borrow::Cow, cell::RefCell};
+use std::cell::RefCell;
 
 mod throughput;
 
@@ -28,10 +28,7 @@ lazy_static! {
         "value1", "value2", "value3", "value4", "value5", "value6", "value7", "value8", "value9",
         "value10"
     ];
-    static ref HISTOGRAM: Histogram<u64> = PROVIDER
-        .meter(<&str as Into<Cow<'static, str>>>::into("test"))
-        .u64_histogram("hello")
-        .init();
+    static ref HISTOGRAM: Histogram<u64> = PROVIDER.meter("test").u64_histogram("hello").init();
 }
 
 thread_local! {

stress/src/metrics_overflow.rs

@@ -16,18 +16,15 @@ use rand::{
     rngs::{self},
     Rng, SeedableRng,
 };
-use std::{borrow::Cow, cell::RefCell};
+use std::cell::RefCell;
 
 mod throughput;
 
 lazy_static! {
     static ref PROVIDER: SdkMeterProvider = SdkMeterProvider::builder()
         .with_reader(ManualReader::builder().build())
         .build();
-    static ref COUNTER: Counter<u64> = PROVIDER
-        .meter(<&str as Into<Cow<'static, str>>>::into("test"))
-        .u64_counter("hello")
-        .init();
+    static ref COUNTER: Counter<u64> = PROVIDER.meter("test").u64_counter("hello").init();
 }
 
 thread_local! {