replaced the term "paste" with the more generic "document"

kudos @Ribas160

lib/Model/AbstractModel.php

@@ -88,7 +88,7 @@ abstract class AbstractModel
     public function setId($id)
     {
         if (!self::isValidId($id)) {
-            throw new Exception('Invalid paste ID.', 60);
+            throw new Exception('Invalid document ID.', 60);
         }
         $this->_id = $id;
     }
@@ -129,14 +129,6 @@ abstract class AbstractModel
      */
     abstract public function store();
 
-    /**
-     * Delete the current instance.
-     *
-     * @access public
-     * @throws Exception
-     */
-    abstract public function delete();
-
     /**
      * Test if current instance exists in store.
      *

lib/Model/Comment.php

@@ -71,17 +71,6 @@ class Comment extends AbstractModel
         }
     }
 
-    /**
-     * Delete the comment.
-     *
-     * @access public
-     * @throws Exception
-     */
-    public function delete()
-    {
-        throw new Exception('To delete a comment, delete its parent paste', 64);
-    }
-
     /**
      * Test if comment exists in store.
      *
@@ -131,7 +120,7 @@ class Comment extends AbstractModel
     public function setParentId($id)
     {
         if (!self::isValidId($id)) {
-            throw new Exception('Invalid paste ID.', 65);
+            throw new Exception('Invalid document ID.', 65);
         }
         $this->_data['parentid'] = $id;
     }

lib/Model/Paste.php

@@ -111,7 +111,7 @@ class Paste extends AbstractModel
                 $this->_data
             ) === false
         ) {
-            throw new Exception('Error saving paste. Sorry.', 76);
+            throw new Exception('Error saving document. Sorry.', 76);
         }
     }