diff --git a/doc/api/frames.inc b/doc/api/frames.inc
deleted file mode 100644
index 43836e3..0000000
--- a/doc/api/frames.inc
+++ /dev/null
@@ -1,32 +0,0 @@
-Working with vectors
-====================
-
-Scalars and Vectors
-~~~~~~~~~~~~~~~~~~~~~~~
-
-.. _scalar:
-
-scalar
---------------
-
-TODO
-
-.. _vector:
-
-vector
---------------
-
-TODO
-
-Robot reference frame
-~~~~~~~~~~~~~~~~~~~~~~~
-
-.. _robotframe:
-
-Robot reference frame
-----------------------
-
-TODO (explanation, diagram, etc)::
-    * X: To the right
-    * Y: forward
-    * Z: upward