Remove OnlyGrabOwners check from Wire Grabber

```
if self.OnlyGrabOwners and (not trace.Entity.GetPlayer or self:GetPlayer() ~=
trace.Entity:GetPlayer()) then return false end
```

This check prevents players from being able to grab anything other than their own _wire_ components. 

_Non-wire_ components don't have a ``` :GetPlayer() ``` function, so this will always return ``` false ``` when trying to grab entities like regular props, even if they belong to the grabber's owner.

Since the ``` sbox_wire_grabbers_onlyOwnersProps ``` convar is ``` 1 ``` by default, this will essentially 'break' (in the minds of the players) the wire grabber on every server.

The ``` wire forcer ``` , which can be seen as an equivalent tool with the opposite functionality of the grabber, doesn't use an sbox convar and works as intended, which is why I propose this check be removed.

``` tl;dr ``` -- just let the call to CanTool determine whether to block the grabbing or not.

As for the unused code (Free Fall's code), I propose it be removed since it is not being used, and can simply be recovered (if need be) by viewing the code history prior to this commit.