misc: rate_limiter: streamline error Display::fmt()

The changes were mostly automatically applied using the Python
script mentioned in the first commit of this series.

Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
On-behalf-of: SAP philipp.schuster@sap.com

rate_limiter/src/lib.rs

@@ -65,7 +65,7 @@ pub enum Error {
     #[error("Event handler was called spuriously: {0}")]
     SpuriousRateLimiterEvent(&'static str),
     /// The event handler encounters while TimerFd::wait()
-    #[error("Failed to wait for the timer: {0}")]
+    #[error("Failed to wait for the timer")]
     TimerFdWaitError(#[source] std::io::Error),
 }