[fix] Use PythonQt fork instead of a patch.

According to recommendations in SuperbuildMacros, patches should not be
applied to projects sourced from Git repository. That's why we get
sources from a PythonQt fork instead of using the superbuild_apply_patch
function.

Projects/patches/pythonqt-fix-native-threads.patch

-From 1ccbae62bb5e704c61462d8ce49b43fa6ad0badd Mon Sep 17 00:00:00 2001
-From: Jerome Dias <jerome.dias@kitware.com>
-Date: Mon, 26 Oct 2020 16:24:44 +0100
-Subject: [PATCH] [fix] disable _POSIX_THREADS unset.
-
-In unix platform since python 3.7, _POSIX_THREADS need to be defined. If
-it's not the case the native threads type is unknown and a build error
-is returned in pythread.h.
----
- src/PythonQtPythonInclude.h | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/src/PythonQtPythonInclude.h b/src/PythonQtPythonInclude.h
-index be8d0e0..dc9c7f1 100644
---- a/src/PythonQtPythonInclude.h
-+++ b/src/PythonQtPythonInclude.h
-@@ -35,7 +35,7 @@
- 
- // Undefine macros that Python.h defines to avoid redefinition warning.
- #undef _POSIX_C_SOURCE
--#undef _POSIX_THREADS
-+// #undef _POSIX_THREADS
- #undef _XOPEN_SOURCE
- 
- // Undefine Qt keywords that conflict with Python headers
--- 
-2.17.1
-

Projects/pythonqt.cmake

@@ -11,8 +11,4 @@ superbuild_add_project(pythonqt
     # specify the apple app install prefix. No harm in specifying it for all
     # platforms.
     -DMACOSX_APP_INSTALL_PREFIX:PATH=<INSTALL_DIR>/Applications
-)
-
-if (UNIX)
-  superbuild_apply_patch(pythonqt fix-native-threads "Disable _PTHREAD unset to get native threads type.")
-endif ()
\ No newline at end of file
+)
\ No newline at end of file

versions.cmake

@@ -11,7 +11,7 @@
 # endif()
 
 superbuild_set_revision(pythonqt
-  GIT_REPOSITORY http://github.com/commontk/PythonQt.git
+  GIT_REPOSITORY https://gitlab.kitware.com/LidarView/pythonqt.git
   GIT_TAG patched-8)
 
 set(PARAVIEW_VERSION 5.6)