Remove deprecated std::error::Error::description() impls

gstreamer-pbutils/src/encoding_profile.rs

@@ -266,15 +266,7 @@ impl fmt::Display for EncodingProfileBuilderError {
     }
 }
 
-impl error::Error for EncodingProfileBuilderError {
-    fn description(&self) -> &str {
-        "invalid parameters to build encoding profile"
-    }
-
-    fn cause(&self) -> Option<&dyn error::Error> {
-        None
-    }
-}
+impl error::Error for EncodingProfileBuilderError {}
 
 #[derive(Debug)]
 struct EncodingProfileBuilderCommonData<'a> {

gstreamer/src/format.rs

@@ -39,11 +39,7 @@ pub struct Percent(pub Option<u32>);
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct TryFromGenericFormattedValueError(());
 
-impl std::error::Error for TryFromGenericFormattedValueError {
-    fn description(&self) -> &str {
-        "invalid generic value format"
-    }
-}
+impl std::error::Error for TryFromGenericFormattedValueError {}
 
 impl std::fmt::Display for TryFromGenericFormattedValueError {
     fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
@@ -667,11 +663,7 @@ impl AsMut<Option<u32>> for Percent {
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct TryPercentFromFloatError(());
 
-impl std::error::Error for TryPercentFromFloatError {
-    fn description(&self) -> &str {
-        "value out of range"
-    }
-}
+impl std::error::Error for TryPercentFromFloatError {}
 
 impl std::fmt::Display for TryPercentFromFloatError {
     fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {

gstreamer/src/structure.rs

@@ -73,11 +73,7 @@ impl<'name> fmt::Display for GetError<'name> {
     }
 }
 
-impl<'name> error::Error for GetError<'name> {
-    fn description(&self) -> &str {
-        "GetError: Structure field value"
-    }
-}
+impl<'name> error::Error for GetError<'name> {}
 
 pub struct Structure(ptr::NonNull<StructureRef>, PhantomData<StructureRef>);
 unsafe impl Send for Structure {}