qcam: Specify Feather icons license in DEP5

Specify the license of the Feather icons files in the .reuse/dep5 file.
Technically speaking the SVG format supports comments, SPDX could thus
be used, but that would be impractical both due to the large number of
files, and the fact that they would then diverge from the upstream
project.

We can remove the README.md file, as it now only contains redundant or
incorrect information: the license and project URL are contained in the
DEP5 file, and the comment related to generation of the GRC file is
outdated as the file is now manually edited to only include the icons
that we need.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

.reuse/dep5

@@ -8,3 +8,8 @@ Files: src/ipa/raspberrypi/data/*.json
        utils/raspberrypi/ctt/ctt_ref.pgm
 Copyright: 2019-2020 Raspberry Pi (Trading) Ltd.
 License: BSD-2-Clause
+
+Files: src/qcam/assets/feathericons/*.svg
+Copyright: 2019 Cole Bemis (and other Feather icons contributors)
+License: MIT
+Comment: https://feathericons.com/

src/qcam/assets/feathericons/README.md

@@ -1,5 +0,0 @@
-Icons from https://feathericons.com/
-License: MIT
-
-Generate the QRC file with:
- rcc --project