Deletes this palette. Fusion native palettes cannot be deleted. Use the isNative property to determine if this is a native or API created palette.
"textCommandPalette_var" is a variable referencing a TextCommandPalette object. | 
        
"textCommandPalette_var" is a variable referencing a TextCommandPalette object. | 
        
| Type | Description | 
| boolean | Returns true if the delete was successful. |