remove_key
Description:
Removes all keys matching the conditions specificed in the arguments.
Note: 
      
        
    
    Use KeyframeTransition instead
Parameters:
| this | a Animator | 
| object | a Object to search for, or  | 
| property_name | a specific property name to query for, or  | 
| progress | a specific progress to search for or a negative value for all |