pythonPackages.pydub: fix build and tests

- remove obsolete patch that caused build failure
- no tests were run because required data files were missing in pypi
  version; use github version instead

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

@@ -1,19 +1,22 @@
-{ stdenv, buildPythonPackage, fetchPypi, scipy, ffmpeg-full }:
+{ stdenv, buildPythonPackage, fetchFromGitHub, scipy, ffmpeg-full }:
 
 buildPythonPackage rec {
   pname = "pydub";
   version = "0.22.1";
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "20beff39e9959a3b2cb4392802aecb9b2417837fff635d2b00b5ef5f5326d313";
+  # pypi version doesn't include required data files for tests
+  src = fetchFromGitHub {
+    owner = "jiaaro";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "0xqyvzgdfy01p98wnvsrf6iwdfq91ad377r6j12r8svm13ygx5bv";
   };
 
-  patches = [
-    ./pyaudioop-python3.patch
-  ];
-
   checkInputs = [ scipy ffmpeg-full ];
 
+  checkPhase = ''
+    python test/test.py
+  '';
+
   meta = with stdenv.lib; {
     description = "Manipulate audio with a simple and easy high level interface.";
     homepage    = "http://pydub.com/";