[jhbuild] core-deps-latest: remove mir_backend option from gtk+-3

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 06f0bd0162edddc257d5cadf2710038dc89cf13f
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Dec 14 14:10:14 2021 +0200

    core-deps-latest: remove mir_backend option from gtk+-3
    
    https://gitlab.gnome.org/GNOME/gtk/-/commit/31a57fe389b82ba708cedf00848740e4df55d5d0

 modulesets/gnome-suites-core-deps-latest.modules | 6 ------
 1 file changed, 6 deletions(-)
---
diff --git a/modulesets/gnome-suites-core-deps-latest.modules 
b/modulesets/gnome-suites-core-deps-latest.modules
index 6a71bd9d..58e98464 100644
--- a/modulesets/gnome-suites-core-deps-latest.modules
+++ b/modulesets/gnome-suites-core-deps-latest.modules
@@ -925,12 +925,6 @@
     <if condition-unset="wayland">
       <mesonargs value="-Dwayland_backend=false"/>
     </if>
-    <if condition-set="mir">
-      <mesonargs value="-Dmir_backend=true"/>
-    </if>
-    <if condition-unset="mir">
-      <mesonargs value="-Dmir_backend=false"/>
-    </if>
     <if condition-set="quartz">
       <mesonargs value="-Dquartz_backend=true"/>
     </if>