Type Argument Specification Is Redundant

It seems whatever compiler Unity uses is not capable of inferring types in generics when passing in method groups.

For example:

```
public class Foo
{
private Dictionary> funcs = new Dictionary>();

public void AddFunc(Func func)
{
funcs.Add(typeof(T), (name) => func(name));
}

public Foo()
{
AddFunc(PlayerPrefs.GetString);
}
}

```

This is valid code, but does not compile in Unity because it seems incapable of deciding between the overloads of `PlayerPrefs.GetString(string key)` and `PlayerPrefs.GetString(string key, string defaultValue)`... probably a low priority bug in their mono compiler that's never been addressed.

Specifying the `` directly gets it to compile eg: `AddFunc(PlayerPrefs.GetString)`, but then R# flags this argument specification as redundant.