apps tagged with NonFreeAssets currently show code license

Sorry, I should have done 04b2d7bda via a merge request.  Now I see
that there is a _NonFreeAssets_ convention to show the license of the
rest of the package.  So while my statement about combining licenses
was correct, I'll revert my change until we deal with the
_NonFreeAssets_ issue as a whole.  There are currently about 10 apps in
this state.

This reverts 2/3 changes in commit 04b2d7bda7.

https://gitlab.com/fdroid/fdroiddata/merge_requests/5623#note_226776698

metadata/com.powerje.nyan.yml

@@ -2,7 +2,7 @@ AntiFeatures:
   - NonFreeAssets
 Categories:
   - Theming
-License: CC-BY-NC-3.0
+License: Apache-2.0
 SourceCode: https://github.com/powerje/NyanDroid
 IssueTracker: https://github.com/powerje/NyanDroid/issues
 

metadata/com.rj.pixelesque.yml

@@ -2,7 +2,7 @@ AntiFeatures:
   - NonFreeAssets
 Categories:
   - Graphics
-License: CC-BY-NC-3.0
+License: BSD-3-Clause
 SourceCode: https://github.com/rjmarsan/Pixelesque
 IssueTracker: https://github.com/rjmarsan/Pixelesque/issues