remove the reference to the LICENSE file in the copyright notice temp…

…late.

Signed-off-by: Cary Phillips <[email protected]>

CONTRIBUTING.md

@@ -411,7 +411,7 @@ define's such as ``INT_MAX``:
 All new source files should begin with a copyright and license stating:
 
     // SPDX-License-Identifier: BSD-3-Clause
-    // Copyright Contributors to the OpenEXR Project. See LICENSE file for details.
+    // Copyright Contributors to the OpenEXR Project.
 
 #### Third-party libraries