CPython and PyPy: update meta.maintainers

pkgs/development/interpreters/python/cpython/2.7/default.nix

···
       '';
       license = stdenv.lib.licenses.psfl;
       platforms = stdenv.lib.platforms.all;
-      maintainers = with stdenv.lib.maintainers; [ chaoflow domenkozar ];
+      maintainers = with stdenv.lib.maintainers; [ fridh ];
       # Higher priority than Python 3.x so that `/bin/python` points to `/bin/python2`
       # in case both 2 and 3 are installed.
       priority = -100;

pkgs/development/interpreters/python/cpython/3.4/default.nix

···
     '';
     license = licenses.psfl;
     platforms = with platforms; linux ++ darwin;
-    maintainers = with maintainers; [ chaoflow domenkozar cstrahan ];
+    maintainers = with maintainers; [ fridh ];
   };
 }

pkgs/development/interpreters/python/cpython/3.5/default.nix

···
     '';
     license = licenses.psfl;
     platforms = with platforms; linux ++ darwin;
-    maintainers = with maintainers; [ chaoflow domenkozar cstrahan ];
+    maintainers = with maintainers; [ fridh ];
   };
 }

pkgs/development/interpreters/python/cpython/3.6/default.nix

···
     '';
     license = licenses.psfl;
     platforms = with platforms; linux ++ darwin;
-    maintainers = with maintainers; [ chaoflow domenkozar cstrahan kragniz ];
+    maintainers = with maintainers; [ fridh kragniz ];
   };
 }

pkgs/development/interpreters/python/pypy/2.7/default.nix

···
     description = "Fast, compliant alternative implementation of the Python language (2.7.13)";
     license = licenses.mit;
     platforms = platforms.linux;
-    maintainers = with maintainers; [ domenkozar ];
+    maintainers = with maintainers; [ ];
   };
 }