[epiphany] Revert "TechPreview: Enable internal WebKit audio mixer"

[Michael Catanzaro <mcatanzaro src gnome org>]

commit d46bc6f218cac2e75c2891d735fcd63258088ef8
Author: Michael Catanzaro <mcatanzaro redhat com>
Date:   Wed Dec 15 13:35:21 2021 -0600

    Revert "TechPreview: Enable internal WebKit audio mixer"
    
    This reverts commit 9dfce4fca78a86e0668500272a116613a0a973b1.
    
    I should not have suggested this. See:
    https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1039#note_1335603

 org.gnome.Epiphany.json | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/org.gnome.Epiphany.json b/org.gnome.Epiphany.json
index c46badcac..9f37ea823 100644
--- a/org.gnome.Epiphany.json
+++ b/org.gnome.Epiphany.json
@@ -17,8 +17,7 @@
         "--socket=fallback-x11",
         "--socket=pulseaudio",
         "--socket=wayland",
-        "--system-talk-name=org.freedesktop.GeoClue2",
-        "--env=WEBKIT_GST_ENABLE_AUDIO_MIXER=1"
+        "--system-talk-name=org.freedesktop.GeoClue2"
     ],
     "modules" : [
          {