remove Columbia copyright statement from CC0 license

LICENSE.rst

@@ -1,9 +1,3 @@
-BSD 3-Clause License
-
-Copyright (c) 2024, The Trustees of Columbia University
-in the City of New York.
-All rights reserved.
-
 The laws of most jurisdictions throughout the world automatically confer
 exclusive Copyright and Related Rights (defined below) upon the creator and
 subsequent owner(s) (each and all, an "owner") of an original work of
@@ -120,4 +114,4 @@ For more information, please see
 ----------------------------------
 
 NOTE: ace and jsoneditor in the regolith/static/ dir are covered under their own
-licences.
+licences.