Remove abstract methods from Watcher

src/Loop/Watcher/Immediate.php

@@ -101,7 +101,7 @@ public function cancel()
     }
 
     /**
-     * {@inheritdoc}
+     * An unreferenced event will allow the event loop to exit if no other watchers are pending.
      */
     public function unreference()
     {
@@ -110,7 +110,7 @@ public function unreference()
     }
 
     /**
-     * {@inheritdoc}
+     * Adds a reference to the event, causing the event loop to continue to run as long as the watcher is still pending.
      */
     public function reference()
     {

src/Loop/Watcher/Io.php

@@ -150,15 +150,15 @@ public function getResource()
     }
 
     /**
-     * {@inheritdoc}
+     * An unreferenced event will allow the event loop to exit if no other watchers are pending.
      */
     public function unreference()
     {
         $this->manager->unreference($this);
     }
 
     /**
-     * {@inheritdoc}
+     * Adds a reference to the event, causing the event loop to continue to run as long as the watcher is still pending.
      */
     public function reference()
     {

src/Loop/Watcher/Signal.php

@@ -118,7 +118,7 @@ public function getSignal()
     }
 
     /**
-     * {@inheritdoc}
+     * An unreferenced event will allow the event loop to exit if no other watchers are pending.
      */
     public function unreference()
     {
@@ -127,7 +127,7 @@ public function unreference()
     }
 
     /**
-     * {@inheritdoc}
+     * Adds a reference to the event, causing the event loop to continue to run as long as the watcher is still pending.
      */
     public function reference()
     {

src/Loop/Watcher/Timer.php

@@ -144,7 +144,7 @@ public function again()
     }
 
     /**
-     * {@inheritdoc}
+     * An unreferenced event will allow the event loop to exit if no other watchers are pending.
      */
     public function unreference()
     {
@@ -153,7 +153,7 @@ public function unreference()
     }
 
     /**
-     * {@inheritdoc}
+     * Adds a reference to the event, causing the event loop to continue to run as long as the watcher is still pending.
      */
     public function reference()
     {

src/Loop/Watcher/Watcher.php

@@ -33,14 +33,4 @@ public function setData($data)
     {
         $this->data = $data;
     }
-
-    /**
-     * An unreferenced event will allow the event loop to exit if no other watchers are pending.
-     */
-    abstract public function unreference();
-
-    /**
-     * Adds a reference to the event, causing the event loop to continue to run as long as the watcher is still pending.
-     */
-    abstract public function reference();
 }