Remove stray alpha mentions (#355)

Author: mattwthompson

docs/api.rst

@@ -3,8 +3,6 @@ API
 
 Below is an outline of the API for ``openff-qcsubmit``. See the examples for details on how to use these objects.
 
-.. warning:: The ``openff-qcsubmit`` package is still pre-alpha, so the API is still in flux.
-
 Datasets
 """"""""
 

docs/index.md

@@ -7,10 +7,6 @@ QCSubmit helps to curate and contribute new quantum chemical (QC) datasets to th
 [QCArchive]: https://qcarchive.molssi.org/
 [QCFractal]: http://docs.qcarchive.molssi.org/projects/qcfractal/en/latest/
 
-:::{warning} 
-`openff-qcsubmit` is still pre-alpha. It is not fully tested and the API is still in flux.
-:::
-
 
 :::{toctree}
 ---