Remove unused function.

Author: micaeljtoliveira

src/access/parsers/utils.py

@@ -36,8 +36,3 @@ def convert_to_string(value) -> str:
         return "{:e}".format(value).replace("e", "D")
     else:
         return str(value)
-
-
-def nano_to_sec(nanos):
-    """Convert nanoseconds to seconds."""
-    return nanos / (1000 * 1000 * 1000)