Remove MessageTimestamp constructor from time_point

include/cppkafka/message.h

@@ -244,12 +244,6 @@ class CPPKAFKA_API MessageTimestamp {
      */
     MessageTimestamp(std::chrono::milliseconds timestamp, TimestampType type);
 
-    /**
-     * Constructs a timestamp object using a 'time_point'.
-     */
-    template <typename Clock, typename Duration = typename Clock::duration>
-    MessageTimestamp(std::chrono::time_point<Clock, Duration> timestamp, TimestampType type);
-
     /**
      * Gets the timestamp value. If the timestamp was created with a 'time_point',
      * the duration represents the number of milliseconds since epoch.

src/message.cpp

@@ -92,13 +92,6 @@ MessageTimestamp::MessageTimestamp(milliseconds timestamp, TimestampType type)
 
 }
 
-template <typename Clock, typename Duration>
-MessageTimestamp::MessageTimestamp(std::chrono::time_point<Clock, Duration> timestamp, TimestampType type)
-: timestamp_(std::chrono::duration_cast<std::chrono::milliseconds>(timestamp.time_since_epoch())),
-  type_(type) {
-
-}
-
 milliseconds MessageTimestamp::get_timestamp() const {
     return timestamp_;
 }