code cleanup

Author: solontsev

src/ast/mod.rs

@@ -29,7 +29,6 @@ use helpers::{
 };
 
 use core::cmp::Ordering;
-use core::fmt::Formatter;
 use core::ops::Deref;
 use core::{
     fmt::{self, Display},
@@ -7994,7 +7993,7 @@ pub struct CreateServerStatement {
 }
 
 impl fmt::Display for CreateServerStatement {
-    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let CreateServerStatement {
             name,
             if_not_exists,

src/lib.rs

@@ -163,7 +163,6 @@ extern crate alloc;
 #[macro_use]
 #[cfg(test)]
 extern crate pretty_assertions;
-extern crate core;
 
 pub mod ast;
 #[macro_use]