[gnome-photos] flatpak: Remove custom set CFLAGS from the manifest

[Jordan Petridis <jpetridis src gnome org>]

commit 212771baa604e9975340b4bbf906d960378ef3e7
Author: Jordan Petridis <jordan centricular com>
Date:   Tue Jan 4 06:26:16 2022 +0200

    flatpak: Remove custom set CFLAGS from the manifest
    
    flatpak-builder now uses the default ones provided by the runtime.
    You can find them here /etc/flatpak-builder/defaults.json

 flatpak/org.gnome.Photos.json | 7 -------
 1 file changed, 7 deletions(-)
---
diff --git a/flatpak/org.gnome.Photos.json b/flatpak/org.gnome.Photos.json
index 8adaabfd..09dd6530 100644
--- a/flatpak/org.gnome.Photos.json
+++ b/flatpak/org.gnome.Photos.json
@@ -25,13 +25,6 @@
         "--talk-name=org.gtk.vfs",
         "--talk-name=org.gtk.vfs.*"
     ],
-    "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",