python.pkgs.cairocffi: remove superfluous patch

pkgs/development/python-modules/cairocffi/cairocffi-0.8.1-cairo-1.15.12.patch

@@ -1,24 +0,0 @@
-diff --git a/cairocffi/test_cairo.py b/cairocffi/test_cairo.py
-index 1588349..5452910 100644
---- a/cairocffi/test_cairo.py
-+++ b/cairocffi/test_cairo.py
-@@ -292,7 +292,8 @@ def test_pdf_surface():
-         pdf_bytes = file_obj.getvalue()
-         assert pdf_bytes.startswith(b'%PDF')
-         assert b'/MediaBox [ 0 0 123 432 ]' in pdf_bytes
--        assert pdf_bytes.count(b'/Type /Page\n') == 1
-+        assert pdf_bytes.count(b'/Type /Pages') == 1
-+        assert pdf_bytes.count(b'/Type /Page') == 2
- 
-     file_obj = io.BytesIO()
-     surface = PDFSurface(file_obj, 1, 1)
-@@ -306,7 +307,8 @@ def test_pdf_surface():
-     assert b'/MediaBox [ 0 0 1 1 ]' not in pdf_bytes
-     assert b'/MediaBox [ 0 0 12 100 ]' in pdf_bytes
-     assert b'/MediaBox [ 0 0 42 700 ]' in pdf_bytes
--    assert pdf_bytes.count(b'/Type /Page\n') == 2
-+    assert pdf_bytes.count(b'/Type /Pages') == 1
-+    assert pdf_bytes.count(b'/Type /Page') == 3
- 
- 
- def test_svg_surface():

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

@@ -49,7 +49,6 @@ buildPythonPackage rec {
       gdk_pixbuf = gdk_pixbuf.out;
     })
     ./fix_test_scaled_font.patch
-    ./cairocffi-0.8.1-cairo-1.15.12.patch
   ];
 
   meta = with lib; {