Remove failing doctests.

src/proto/core/value.rs

@@ -241,11 +241,7 @@ impl<'a> ValueDecoder<'a> {
 
   /// Attempts to decode a value of the given type.
   ///
-  /// Allows easy decoding of complex values using type inference:
-  ///
-  /// ```
-  /// let val: Foo = decoder.decode()?;
-  /// ```
+  /// Allows easy decoding of complex values using type inference.
   pub fn decode<T: ValueDecode>(&mut self) -> Result<T, ValueDecodeError> {
     T::decode_from(self)
   }
@@ -388,10 +384,7 @@ impl<'a> ValueEncoder<'a> {
 
   /// Encodes the given value into the underlying buffer.
   ///
-  /// Allows for easy encoding with type inference:
-  /// ```
-  /// encoder.encode(&Foo::new(bar))?;
-  /// ```
+  /// Allows for easy encoding with type inference.
   pub fn encode<T: ValueEncode + ?Sized>(
     &mut self,
     val: &T,