Revert "Fix Duration, Clock, and QoS Docs (#1428)" (#1447)

This reverts commit 59671a0.

Signed-off-by: Tomoya Fujita <[email protected]>

Author: fujitatomoya

rclpy/package.xml

@@ -55,6 +55,13 @@
 
   <doc_depend>python3-sphinx</doc_depend>
   <doc_depend>python3-sphinx-rtd-theme</doc_depend>
+  <!-- We add these modules as doc_depends in order to include them into the
+  autodoc_mock_imports list. This prevents TypeErrors from being thrown
+  when these modules import constants from rclpy C modules.
+  TODO: Remove these depends once a better solution is found.-->
+  <doc_depend>rclpy.duration</doc_depend>
+  <doc_depend>rclpy.qos</doc_depend>
+  <doc_depend>rclpy.clock</doc_depend>
 
   <export>
     <build_type>ament_cmake</build_type>