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/constraint_bullet.cpp

@@ -33,10 +33,6 @@
 #include "collision_object_bullet.h"
 #include "space_bullet.h"
 
-/**
-	@author AndreaCatania
-*/
-
 ConstraintBullet::ConstraintBullet() {}
 
 void ConstraintBullet::setup(btTypedConstraint *p_constraint) {