Replace impl ToString with impl Display

If the Display interface is implemented the compiler will automatically
derive an implementation of ToString.

Test: m rust
Bug: 333887339
Change-Id: Ib07011b5004bdc42b60eff7405528b72e77b9496

1 files changed, 3 insertions, 3 deletions

diff --git a/profcollectd/libprofcollectd/config.rs b/profcollectd/libprofcollectd/config.rs
index af714242..cdf14879 100644
--- a/profcollectd/libprofcollectd/config.rs
+++ b/profcollectd/libprofcollectd/config.rs
@@ -82,9 +82,9 @@ impl Config {
     }
 }
 
-impl ToString for Config {
-    fn to_string(&self) -> String {
-        serde_json::to_string(self).expect("Failed to deserialise configuration.")
+impl std::fmt::Display for Config {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", serde_json::to_string(self).expect("Failed to deserialise configuration."))
     }
 }