Remove executable permissions on images to make docs lint happy

[ci skip]

Remove executable permissions on images to make docs lint happy
1182fccd · Stan Hu · 4c020c8c · 1182fccd · 1182fccd · 1182fccd
Commit 1182fccd authored 7 years ago by Stan Hu
--- a/doc/development/ux_guide/img/illustration-size-large-horizontal.png
+++ b/doc/development/ux_guide/img/illustration-size-large-horizontal.png
--- a/doc/development/ux_guide/img/illustration-size-medium.png
+++ b/doc/development/ux_guide/img/illustration-size-medium.png
--- a/doc/development/ux_guide/img/illustrations-border-radius.png
+++ b/doc/development/ux_guide/img/illustrations-border-radius.png
--- a/doc/development/ux_guide/img/illustrations-caps-do.png
+++ b/doc/development/ux_guide/img/illustrations-caps-do.png
--- a/doc/development/ux_guide/img/illustrations-caps-don't.png
+++ b/doc/development/ux_guide/img/illustrations-caps-don't.png
--- a/doc/development/ux_guide/img/illustrations-color-grey.png
+++ b/doc/development/ux_guide/img/illustrations-color-grey.png
--- a/doc/development/ux_guide/img/illustrations-color-orange.png
+++ b/doc/development/ux_guide/img/illustrations-color-orange.png
--- a/doc/development/ux_guide/img/illustrations-color-purple.png
+++ b/doc/development/ux_guide/img/illustrations-color-purple.png
--- a/doc/development/ux_guide/img/illustrations-geometric.png
+++ b/doc/development/ux_guide/img/illustrations-geometric.png
--- a/doc/development/ux_guide/img/illustrations-palette-oragne.png
+++ b/doc/development/ux_guide/img/illustrations-palette-oragne.png
--- a/doc/development/ux_guide/img/illustrations-palette-purple.png
+++ b/doc/development/ux_guide/img/illustrations-palette-purple.png