Add option to automatically remove symbol after animation has completed

[JonnyDawe]

I propose adding a new configuration option to the animation function that will allow the user to specify if they want the symbol to be removed automatically after the animation finishes. The option could be called removeOnComplete and be a boolean value that defaults to false (i.e., the symbol doesn't get removed by default).

If the removeOnComplete option is set to true, the library should remove the symbol from the map once the animation has completed.