iotests: Move try_remove to iotests.py

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Message-Id: <20210118105720.14824-4-mreitz@redhat.com>

tests/qemu-iotests/iotests.py

@@ -515,12 +515,15 @@ class FilePath:
         return False
 
 
+def try_remove(img):
+    try:
+        os.remove(img)
+    except OSError:
+        pass
+
 def file_path_remover():
     for path in reversed(file_path_remover.paths):
-        try:
-            os.remove(path)
-        except OSError:
-            pass
+        try_remove(path)
 
 
 def file_path(*names, base_dir=test_dir):