resource: remove merge fn from pub api

Author: pitoniak32

opentelemetry-sdk/src/resource/mod.rs

@@ -177,7 +177,7 @@ impl Resource {
     /// 5. If both resources do not have a schema url, the schema url will be empty.
     ///
     /// [Schema url]: https://github.com/open-telemetry/opentelemetry-specification/blob/v1.9.0/specification/schemas/overview.md#schema-url
-    pub fn merge<T: Deref<Target = Self>>(&self, other: T) -> Self {
+    fn merge<T: Deref<Target = Self>>(&self, other: T) -> Self {
         if self.is_empty() {
             return other.clone();
         }

opentelemetry-stdout/examples/basic.rs

@@ -14,11 +14,9 @@ use opentelemetry_sdk::trace::TracerProvider;
 use opentelemetry_sdk::Resource;
 
 static RESOURCE: Lazy<Resource> = Lazy::new(|| {
-    Resource::default().merge(
-        &Resource::builder_empty()
-            .with_service_name("basic-stdout-example")
-            .build(),
-    )
+    Resource::builder()
+        .with_service_name("basic-stdout-example")
+        .build()
 });
 
 #[cfg(feature = "trace")]