diff --git a/doc/main/signaltypes.rst b/doc/main/signaltypes.rst
index 4e701c1..8fea369 100644
--- a/doc/main/signaltypes.rst
+++ b/doc/main/signaltypes.rst
@@ -260,5 +260,3 @@ Fahrenheit (°F) or Kelvin (K), you can use the following conversion formulas:
 hue: deg
 --------------
 Hue of a color (0-359 degrees).
-
-TODO: diagram