no_std = no_time.

src/serde/de.rs

@@ -156,7 +156,6 @@ impl<'de> Deserializer<'de> for DynamicDeserializer<'de> {
             #[cfg(not(feature = "no_object"))]
             Union::Map(..) => self.deserialize_map(visitor),
             Union::FnPtr(..) => self.type_error(),
-            #[cfg(not(feature = "no_std"))]
             #[cfg(not(feature = "no_time"))]
             Union::TimeStamp(..) => self.type_error(),
 

src/serde/serialize.rs

@@ -9,7 +9,6 @@ use std::prelude::v1::*;
 #[cfg(not(feature = "no_object"))]
 use serde::ser::SerializeMap;
 
-#[cfg(not(feature = "no_std"))]
 #[cfg(not(feature = "no_time"))]
 use crate::types::dynamic::Variant;
 
@@ -66,7 +65,6 @@ impl Serialize for Dynamic {
                 map.end()
             }
             Union::FnPtr(ref f, ..) => ser.serialize_str(f.fn_name()),
-            #[cfg(not(feature = "no_std"))]
             #[cfg(not(feature = "no_time"))]
             Union::TimeStamp(ref x, ..) => ser.serialize_str(x.as_ref().type_name()),