Revert "Update APIs for fork of chrono"

This reverts commit bef6bc0.

Author: frannoriega

postgres-types/src/chrono_04.rs

@@ -1,7 +1,6 @@
 use bytes::BytesMut;
 use chrono_04::{DateTime, Duration, FixedOffset, Local, NaiveDate, NaiveDateTime, NaiveTime, Utc};
 use postgres_protocol::types;
-use std::convert::TryInto;
 use std::error::Error;
 
 use crate::{FromSql, IsNull, ToSql, Type};
@@ -23,13 +22,9 @@ impl<'a> FromSql<'a> for NaiveDateTime {
 
 impl ToSql for NaiveDateTime {
     fn to_sql(&self, _: &Type, w: &mut BytesMut) -> Result<IsNull, Box<dyn Error + Sync + Send>> {
-        let time = match self
-            .signed_duration_since(base())
-            .whole_microseconds()
-            .try_into()
-        {
-            Ok(time) => time,
-            Err(_) => return Err("value too large to transmit".into()),
+        let time = match self.signed_duration_since(base()).num_microseconds() {
+            Some(time) => time,
+            None => return Err("value too large to transmit".into()),
         };
         types::timestamp_to_sql(time, w);
         Ok(IsNull::No)
@@ -122,7 +117,7 @@ impl<'a> FromSql<'a> for NaiveDate {
 
 impl ToSql for NaiveDate {
     fn to_sql(&self, _: &Type, w: &mut BytesMut) -> Result<IsNull, Box<dyn Error + Sync + Send>> {
-        let jd = self.signed_duration_since(base().date()).whole_days();
+        let jd = self.signed_duration_since(base().date()).num_days();
         if jd > i64::from(i32::max_value()) || jd < i64::from(i32::min_value()) {
             return Err("value too large to transmit".into());
         }
@@ -147,9 +142,9 @@ impl<'a> FromSql<'a> for NaiveTime {
 impl ToSql for NaiveTime {
     fn to_sql(&self, _: &Type, w: &mut BytesMut) -> Result<IsNull, Box<dyn Error + Sync + Send>> {
         let delta = self.signed_duration_since(NaiveTime::from_hms(0, 0, 0));
-        let time = match delta.whole_microseconds().try_into() {
-            Ok(time) => time,
-            Err(_) => return Err("value too large to transmit".into()),
+        let time = match delta.num_microseconds() {
+            Some(time) => time,
+            None => return Err("value too large to transmit".into()),
         };
         types::time_to_sql(time, w);
         Ok(IsNull::No)