Drop an unused function in iso9600.py

diffoscope/comparators/iso9660.py

@@ -24,27 +24,10 @@ from diffoscope.tools import tool_required
 from diffoscope.difference import Difference
 
 from .utils.file import File
-from .utils.command import Command, our_check_output
+from .utils.command import Command
 from .utils.libarchive import LibarchiveContainerWithFilelist
 
 
-@tool_required("isoinfo")
-def get_iso9660_names(path):
-    return (
-        our_check_output(
-            (
-                "isoinfo",
-                "-R",  # Always use RockRidge for names
-                "-f",
-                "-i",
-                path,
-            ),
-        )
-        .strip()
-        .split("\n")
-    )
-
-
 class ISO9660PVD(Command):
     @tool_required("isoinfo")
     def cmdline(self):