Update tokio/src/runtime/dump.rs

Co-authored-by: Motoyuki Kimura <[email protected]>

tokio/src/runtime/dump.rs

@@ -41,12 +41,9 @@ struct Address(*mut std::ffi::c_void);
 unsafe impl Send for Address {}
 unsafe impl Sync for Address {}
 
-/// A backtrace symbol. This is similar to [`backtrace::BacktraceSymbol`],
-/// but is a separate struct to avoid public dependency issues.
+/// A backtrace symbol.
 ///
-/// This struct is guaranteed to be pure data and operations involving
-/// it will not call platform functions that take an unpredictable amount
-/// of time to finish.
+/// This struct provides accessors for backtrace symbols, similar to [`backtrace::BacktraceSymbol`].
 #[derive(Clone, Debug)]
 pub struct BacktraceSymbol {
     name: Option<Box<[u8]>>,