Delete square when running cmake

[jmcarcell]

BEGINRELEASENOTES

• Remove the square that is run when cmake runs

ENDRELEASENOTES

Nothing wrong with it, just annoying to have to scroll through many lines to get to the interesting part of the cmake output. The summary is kept so it looks like this now:

-- Found nlohmann_json: /usr/share/cmake/nlohmann_json/nlohmann_jsonConfig.cmake (found suitable version "3.11.2", minimum required is "3.11.2") 
-- Python version used for building ROOT 3.10.10
-- Required python version 3.10.10
-- Creating 'datamodel' datamodel

  PODIO Data Model
  ================
  Used datalayout.yaml to create 91 classes in /home/jmcarcell/Key4hep/Key4hep-all/podio/tests/
  Read instructions in the README.md to run your first example!

-- Found nlohmann_json: /usr/share/cmake/nlohmann_json/nlohmann_jsonConfig.cmake (found suitable version "3.11.2", minimum required is "3.10") 
-- Found compatible version of JSON library, will add JSON support to test datamodel
-- Not adding the SIO Blocks library to the targets because the corresponding c++ sources have not been generated
-- Creating 'extension_model' datamodel
/home/jmcarcell/Key4hep/Key4hep-all/podio/python/podio_class_generator.py:100: FutureWarning: Please provide a schema_version entry. It will become mandatory. Setting it to 0 as default
  self.datamodel = PodioConfigReader.read(yamlfile, package_name, upstream_edm)

  PODIO Data Model
  ================
  Used datalayout_extension.yaml to create 17 classes in /home/jmcarcell/Key4hep/Key4hep-all/podio/tests/extension_model/
  Read instructions in the README.md to run your first example!

-- Not adding the SIO Blocks library to the targets because the corresponding c++ sources have not been generated
-- Using test inputs stored in: /home/jmcarcell/Key4hep/Key4hep-all/podio/build/test_input_data_vuJYd3sm

[tmadlener]

This file is part of the files that are installed, so removing it breaks the installation in some of the CI workflows. We would also have to remove it from the list here:

podio/python/CMakeLists.txt

Lines 5 to 9 in 705721d

	set(to_install
	podio_class_generator.py
	podio_schema_evolution.py
	figure.txt
	EventStore.py)

[jmcarcell]

Fixed

[hegner]

I am actually fine with removing it altogether. Is a nice gimmick though ;-)