Fix errors from rustc 1.71.0

Bug: 288268986
Test: m rust
Change-Id: Iea9af044db23cbf6413b13cdb289a5dd1e4c98aa
diff --git a/zipfuse/src/inode.rs b/zipfuse/src/inode.rs
index ea63422..ef48389 100644
--- a/zipfuse/src/inode.rs
+++ b/zipfuse/src/inode.rs
@@ -210,7 +210,7 @@
                     parent = found;
                     // Update the mode if this is a directory leaf.
                     if !is_file && is_leaf {
-                        let mut inode = table.get_mut(parent).unwrap();
+                        let inode = table.get_mut(parent).unwrap();
                         inode.mode = file.unix_mode().unwrap_or(DEFAULT_DIR_MODE);
                     }
                     continue;