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.

core/templates/vector.h

@@ -33,7 +33,6 @@
 
 /**
  * @class Vector
- * @author Juan Linietsky
  * Vector container. Regular Vector Container. Use with care and for smaller arrays when possible. Use Vector for large arrays.
  */