Cleanup unused Error struct - PropagationError (#2547)

Author: cijothomas

opentelemetry/CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - Bump msrv to 1.75.0.
 - **Breaking** `opentelemetry::global::shutdown_tracer_provider()` Removed from this crate, should now use `tracer_provider.shutdown()` see [#2369](https://github.com/open-telemetry/opentelemetry-rust/pull/2369) for a migration example.
+- *Breaking* Removed unused `opentelemetry::PropagationError` struct.
 
 ## 0.27.1
 

opentelemetry/src/propagation/mod.rs

@@ -20,7 +20,6 @@
 //! [`Context`]: crate::Context
 
 use std::collections::HashMap;
-use thiserror::Error;
 
 pub mod composite;
 pub mod text_map_propagator;
@@ -62,37 +61,6 @@ impl<S: std::hash::BuildHasher> Extractor for HashMap<String, String, S> {
     }
 }
 
-/// Error when extracting or injecting context data(i.e propagating) across application boundaries.
-#[derive(Error, Debug)]
-#[error("Cannot {} from {}, {}", ops, message, propagator_name)]
-pub struct PropagationError {
-    message: &'static str,
-    // which propagator does this error comes from
-    propagator_name: &'static str,
-    // are we extracting or injecting information across application boundaries
-    ops: &'static str,
-}
-
-impl PropagationError {
-    /// Error happens when extracting information
-    pub fn extract(message: &'static str, propagator_name: &'static str) -> Self {
-        PropagationError {
-            message,
-            propagator_name,
-            ops: "extract",
-        }
-    }
-
-    /// Error happens when extracting information
-    pub fn inject(message: &'static str, propagator_name: &'static str) -> Self {
-        PropagationError {
-            message,
-            propagator_name,
-            ops: "inject",
-        }
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;