[gnome-usage] flatpak: avoid explicitly setting cflags

[Jordan Petridis <jpetridis src gnome org>]

commit dee7f3ab8e3a7b1419ca6f2514f8367f370f4cdd
Author: Jordan Petridis <jpetridis gnome org>
Date:   Mon Aug 3 21:36:37 2020 +0000

    flatpak: avoid explicitly setting cflags
    
    The runtimes provide a good set of default flags
    at /usr/etc/flatpak-builder/defaults.json
    which gets automatically exported

 org.gnome.Usage.json | 7 -------
 1 file changed, 7 deletions(-)
---
diff --git a/org.gnome.Usage.json b/org.gnome.Usage.json
index b5366ba..b768b76 100644
--- a/org.gnome.Usage.json
+++ b/org.gnome.Usage.json
@@ -14,13 +14,6 @@
         "--filesystem=xdg-run/dconf", "--filesystem=~/.config/dconf:ro",
         "--talk-name=ca.desrt.dconf", "--env=DCONF_USER_CONFIG_DIR=.config/dconf"
     ],
-    "build-options" : {
-        "cflags": "-O2 -g",
-        "cxxflags": "-O2 -g",
-        "env": {
-            "V": "1"
-        }
-    },
     "cleanup": ["/include", "/lib/pkgconfig",
                 "/share/pkgconfig", "/share/aclocal",
                 "/man", "/share/man", "/share/gtk-doc",