cleanup for linter and erroneous unused code

Author: zwerdlds

crates/rsonpath-lib/src/query/automaton/minimizer.rs

@@ -609,7 +609,6 @@ mod tests {
         // Query = $..a.*
         let label = Label::new("a");
         let label = (&label).into();
-        "a";
 
         let nfa = NondeterministicAutomaton {
             ordered_states: vec![

crates/rsonpath-lib/src/query/nonnegative_array_index.rs

@@ -90,7 +90,7 @@ mod tests {
 
     #[test]
     fn index_ulimit_sanity_check() {
-        assert_eq!(9007199254740991, ARRAY_INDEX_ULIMIT);
+        assert_eq!(9_007_199_254_740_991, ARRAY_INDEX_ULIMIT);
     }
 
     #[test]