Style: Remove inconsistently used @author docstrings

Each file in Godot has had multiple contributors who co-authored it over the
years, and the information of who was the original person to create that file
is not very relevant, especially when used so inconsistently.

`git blame` is a much better way to know who initially authored or later
modified a given chunk of code, and most IDEs now have good integration to
show this information.

modules/bullet/bullet_physics_server.cpp

@@ -45,10 +45,6 @@
 
 #include <assert.h>
 
-/**
-	@author AndreaCatania
-*/
-
 #define CreateThenReturnRID(owner, ridData) \
 	RID rid = owner.make_rid(ridData);      \
 	ridData->set_self(rid);                 \