Error: Animation clip Timer (GUIText) is not retargetable?

Hello Everyone,

Well I'm currently working on a timer display on my game that shows a long the player had survived.

In the game the player must avoid incoming meteoroids, and if hit by one the timer stops. The screen fades out, a animation plays on the timer where it centres on the screen, and the text size increase.

To achieve this I decided to use the old animation component, everything is currently working fine, but I noticed that every time I launch the project I receive the follow message:

Animation clip 'Timer' is not retargetable. Animation clips used within the animator controller need to have muscle definitions set up in the asset importer inspector.

Does anyone know that this means? and is there anyway to remove it? I did some searching and found out a thread saying that I need to change some settings in the fbx, however I don't have one for this object because its just a GUIText.