python 3.8 backward compatibility change. Update folder hashing file filter

Author: coresoftware dev

src/scanoss/file_filters.py

@@ -44,7 +44,6 @@
     'license.txt',
     'license.md',
     'copying.lib',
-    'makefile',
 }
 
 DEFAULT_SKIPPED_FILES_HFH = {

src/scanoss/scanners/folder_hasher.py

@@ -249,7 +249,7 @@ def _hash_calc(self, node: DirectoryNode) -> dict:
                 ext_without_dot = extension[1:]
                 extension_map[ext_without_dot] = extension_map.get(ext_without_dot, 0) + 1
 
-            current_directory.removeprefix(self.scan_dir)
+            current_directory.replace(self.scan_dir, '', 1).lstrip(os.path.sep)
             parts = current_directory.split(os.path.sep)
             for d in parts:
                 if d in {'', '.', '..'}: