remove warning

libraries/tar/src/lib.rs

@@ -87,7 +87,7 @@ fn from2tar() {
         checksum: ['0', '0', '0', '0', '0', '0', ' ', '\0'],
         typeflag: '0',
     };
-    let array: [char; 512] = header.try_into().unwrap();
+    let _array: [char; 512] = header.try_into().unwrap();
     // assert_eq!(array)
 }