Remove FindPythonModule (#3736)

This CMake module is not actually needed. Follow-up to #3656 (comment).

CMakeLists.txt

@@ -34,7 +34,6 @@ set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 include(FeatureSummary)
 include(GNUInstallDirs)
 project(ESPResSo)
-include(FindPythonModule)
 include(option_enum)
 include(option_if_available)
 if(POLICY CMP0074)
@@ -197,8 +196,6 @@ if(WITH_HDF5)
   if(HDF5_FOUND)
     if(HDF5_IS_PARALLEL)
       set(H5MD 1)
-      include(FindPythonModule)
-      find_python_module(h5py)
       add_feature_info(HDF5 ON "parallel")
     else()
       unset(H5MD)

testsuite/python/CMakeLists.txt

@@ -205,10 +205,7 @@ python_test(FILE elc.py MAX_NUM_PROC 2)
 python_test(FILE elc_vs_analytic.py MAX_NUM_PROC 2)
 python_test(FILE rotation.py MAX_NUM_PROC 1)
 python_test(FILE shapes.py MAX_NUM_PROC 1)
-
-if(PY_H5PY)
-  python_test(FILE h5md.py MAX_NUM_PROC 2)
-endif(PY_H5PY)
+python_test(FILE h5md.py MAX_NUM_PROC 2)
 
 add_custom_target(
   python_test_data

testsuite/python/h5md.py

@@ -26,8 +26,14 @@
 import unittest_decorators as utx
 import numpy as np
 import espressomd
-import h5py  # h5py has to be imported *after* espressomd (MPI)
 from espressomd.interactions import Virtual
+try:
+    import h5py  # h5py has to be imported *after* espressomd (MPI)
+    skipIfMissingPythonPackage = ut.case._id
+except ImportError:
+    skipIfMissingPythonPackage = ut.skip(
+        "Python module h5py not available, skipping test!")
+
 
 npart = 26
 
@@ -121,6 +127,7 @@ def test_bonds(self):
 
 
 @utx.skipIfMissingFeatures(['H5MD'])
+@skipIfMissingPythonPackage
 class H5mdTestOrdered(CommonTests):
 
     """
@@ -161,6 +168,7 @@ def test_ids(self):
 
 
 @utx.skipIfMissingFeatures(['H5MD'])
+@skipIfMissingPythonPackage
 class H5mdTestUnordered(CommonTests):
 
     """