admin: Adjust license notices of A2-only source (#4884)

There are still a few historical authors who never signed on to the
relicensing of OpenImageIO from BSD-3-Clause to Apache-2.0 two years
ago, usually because we could find no current way to contact them.

The few (< 25) files that still had their extant code were therefore
marked as using both licenses. They they almost always are down to just
a few lines in the whole file that are still original to those authors
(and therefore BSD), so every once in a while, natural code churn and
rewrites of what they touched remove the very last of these lines from a
file, leaving that file entirely Apache-2.0. I noticed that this was the
case for these three files, and so removed the reference to BSD license,
which no longer applies.

Signed-off-by: Larry Gritz <[email protected]>

Author: lgritz

src/include/OpenImageIO/imagebuf.h

@@ -1,5 +1,5 @@
 // Copyright Contributors to the OpenImageIO project.
-// SPDX-License-Identifier: BSD-3-Clause and Apache-2.0
+// SPDX-License-Identifier: Apache-2.0
 // https://github.com/AcademySoftwareFoundation/OpenImageIO
 
 

src/libOpenImageIO/imagebuf.cpp

@@ -1,5 +1,5 @@
 // Copyright Contributors to the OpenImageIO project.
-// SPDX-License-Identifier: BSD-3-Clause and Apache-2.0
+// SPDX-License-Identifier: Apache-2.0
 // https://github.com/AcademySoftwareFoundation/OpenImageIO
 
 

src/webp.imageio/webpoutput.cpp

@@ -1,5 +1,5 @@
 // Copyright Contributors to the OpenImageIO project.
-// SPDX-License-Identifier: BSD-3-Clause and Apache-2.0
+// SPDX-License-Identifier: Apache-2.0
 // https://github.com/AcademySoftwareFoundation/OpenImageIO
 
 #include <cstdio>