Entry for docstring type removal.

Also gets rid of empty Added section

Author: duckontheweb

CHANGELOG.md

@@ -8,12 +8,10 @@
 
 ### Fixed
 
-### Remove
+### Removed
 
 ## [1.0.0-beta.2]
 
-### Added
-
 ### Changed
 
 - Split `DefaultStacIO`'s reading and writing into two methods to allow subclasses to use the default link resolution behavior ([#354](https://github.com/stac-utils/pystac/pull/354))
@@ -25,6 +23,9 @@
 
 ### Removed
 
+- Removed type information from docstrings, since it is redundant with function type
+  annotations ([#342](https://github.com/stac-utils/pystac/pull/342))
+
 ## [1.0.0-beta.1]
 
 ### Added