Merge pull request #4334 from balena-io/marcaurele/remove-gconf2

patch: remove gconf2 libgconf-2-4 deps

docs/USER-DOCUMENTATION.md

@@ -122,7 +122,6 @@ run Etcher on a GNU/Linux system.
 - xrender
 - xtst
 - xscrnsaver
-- gconf-2.0
 - gmodule-2.0
 - nss
 

package.json

@@ -106,8 +106,6 @@
   },
   "hostDependencies": {
     "debian": [
-      "gconf-service",
-      "gconf2",
       "libasound2",
       "libatk1.0-0",
       "libc6",
@@ -119,7 +117,6 @@
       "libfreetype6",
       "libgbm1",
       "libgcc1",
-      "libgconf-2-4",
       "libgdk-pixbuf2.0-0",
       "libglib2.0-0",
       "libgtk-3-0",