This patch removes the Gamma option from the Defocus and Blur nodes. The
reasoning is as follows.
- The option was originally added when the compositor wasn't working on
a strictly linear workflow. So this is rarely needed now.
- It is easy to insert a Gamma node around Blur nodes to perform any
gamma correction if really needed.
- Since we are moving options to inputs, it doesn't seem worth it to
provide this option as an input in the process.
Pull Request: https://projects.blender.org/blender/blender/pulls/138673
17db65dfd0