firefox: Disabled custom optimization level, reverted previous commit

helpers/make-firefox

@@ -256,12 +256,6 @@ debian/rules debian/control
 # Regenerate addon-sdk/moz.build
 ./mach generate-addon-sdk-moz-build
 
-#https://bugzilla.mozilla.org/show_bug.cgi?id=1047803
-sed 's/--enable-optimize$/--enable-optimize="-O2"/' -i debian/config/mozconfig.in
-
-# dom/plugins/test/testplugin/nptest_gtk2.cpp fails to build on gtk3
-sed "s/'testplugin',//" -i dom/plugins/test/moz.build
-
 changelog  "Rebranded for Trisquel"
 
 compile