treewide: remove "ninja test" checkPhase

This is now handled in the ninja setup hook.

(cherry picked from commit f5e099754fffc3d2b68c8ba6fc8025f3c921fddc)

pkgs/applications/audio/cozy-audiobooks/default.nix

@@ -66,10 +66,6 @@ python3Packages.buildPythonApplication rec {
     substituteInPlace cozy/magic/magic.py --replace "ctypes.util.find_library('magic')" "'${file}/lib/libmagic${stdenv.hostPlatform.extensions.sharedLibrary}'"
   '';
 
-  checkPhase = ''
-    ninja test
-  '';
-
   postInstall = ''
     ln -s $out/bin/com.github.geigi.cozy $out/bin/cozy
   '';

pkgs/development/python-modules/pythonix/default.nix

@@ -18,10 +18,6 @@ buildPythonPackage rec {
 
   buildInputs = [ nix boost ];
 
-  checkPhase = ''
-    ninja test
-  '';
-
   meta = with stdenv.lib; {
     description = ''
        Eval nix code from python.