chore: remove pre Python 3.7 compatibility code for shutil

CHANGELOG.md

@@ -125,6 +125,23 @@ and will be removed for release.
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+- Removed pre python 3.7 compatibility code.
+  [PR #2066](https://github.com/RDFLib/rdflib/pull/2066).
+  - Removed fallback in case the `shutil` module does not have the `move`
+    function.
+
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+<!-- CHANGE BARRIER: END PR #2066 -->
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rdflib/graph.py

@@ -1215,11 +1215,7 @@ def serialize(
             serializer.serialize(stream, base=base, encoding=encoding, **args)
             stream.close()
             dest = url2pathname(path) if scheme == "file" else location
-            if hasattr(shutil, "move"):
-                shutil.move(name, dest)
-            else:
-                shutil.copy(name, dest)
-                os.remove(name)
+            shutil.move(name, dest)
         return self
 
     def print(self, format="turtle", encoding="utf-8", out=None):

rdflib/query.py

@@ -276,11 +276,7 @@ def serialize(
             stream = os.fdopen(fd, "wb")
             serializer.serialize(stream, encoding=encoding, **args)
             stream.close()
-            if hasattr(shutil, "move"):
-                shutil.move(name, path)
-            else:
-                shutil.copy(name, path)
-                os.remove(name)
+            shutil.move(name, path)
         return None
 
     def __len__(self):