Remove API breaking note

Author: dstansby

doc/source/index.rst

@@ -3,12 +3,6 @@
 pfsspy is a python package for carrying out Potential Field Source Surface
 modelling, a commonly used magnetic field model of the Sun and other stars.
 
-.. note::
-
-  Until pfsspy 1.0 is released, elements of the API are liable to change between
-  versions. A full changelog that lists breaking changes, and how to adapt
-  your code for them can be found at :ref:`changelog`.
-
 .. note::
   If you find any bugs or have any suggestions for improvement, please raise
   an issue here: https://github.com/dstansby/pfsspy/issues