Remove millisecond versions of methods

The Duration versions have been available since 102ff37.
In std, millisecond versions have been deprecated.

Author: SSheldon

src/lib.rs

@@ -261,13 +261,6 @@ impl Queue {
         }
     }
 
-    /// After the specified delay, submits a closure for asynchronous execution
-    /// on self.
-    pub fn exec_after_ms<F>(&self, ms: u32, work: F)
-            where F: 'static + Send + FnOnce() {
-        self.exec_after(Duration::from_millis(ms as u64), work);
-    }
-
     /// After the specified delay, submits a closure for asynchronous execution
     /// on self.
     pub fn exec_after<F>(&self, delay: Duration, work: F)
@@ -494,13 +487,6 @@ impl Group {
         assert!(result == 0, "Dispatch group wait errored");
     }
 
-    /// Waits for all tasks associated with self to complete within the
-    /// specified duration.
-    /// Returns true if the tasks completed or false if the timeout elapsed.
-    pub fn wait_timeout_ms(&self, ms: u32) -> bool {
-        self.wait_timeout(Duration::from_millis(ms as u64))
-    }
-
     /// Waits for all tasks associated with self to complete within the
     /// specified duration.
     /// Returns true if the tasks completed or false if the timeout elapsed.