Function clear

clear(callback: clearCallback): void
Clears out all key-value pair entries for the current plugin in the internal database and invokes a callback.
Parameters
- callback: clearCallback
  The callback function that is invoked with a bool representing whether the clear was successful.
Returns void
Example
```
osrs.Persistence.clear(
     function(ok)
         if ok then 
             osrs.print("Cleared all entries for the plugin!")
         else 
             osrs.print("Clear failed.")
         end
end
)
```
- Defined in persistence.d.ts:101