Update graphics.md (#269)

i don't think that line should be there.

docs/en/manuals/graphics.md

@@ -5,7 +5,6 @@ brief: This manual outlines Defold's support for graphical elements.
 
 Deprecated manual!
 
-* Read more about [how to import and use 2D graphics here](/manuals/importing-graphics)
 * Read more about [how to import and use 2D graphics here](/manuals/importing-graphics)
 * Read more about [texture filtering](/manuals/texture-filtering)
 * Read more about [materials](/manuals/material)