replace depecretation warning about reproducible tarballs on Python older than 3.9 to a regular warning

Author: lexming

easybuild/framework/easyblock.py

@@ -423,10 +423,9 @@ def get_checksum_for(self, checksums, filename=None, index=None):
             # ignore any checksum for given filename due to changes in https://github.com/python/cpython/issues/90021
             # tarballs made for git repos are not reproducible when created with Python < 3.9
             if sys.version_info[0] >= 3 and sys.version_info[1] < 9:
-                self.log.deprecated(
+                print_warning(
                     "Reproducible tarballs of Git repos are only possible when using Python 3.9+ to run EasyBuild. "
-                    f"Skipping checksum verification of {chksum_input} since Python < 3.9 is used.",
-                    '6.0'
+                    f"Skipping checksum verification of {chksum_input} since Python < 3.9 is used."
                 )
                 return None
             # not all archives formats of git repos are reproducible