Remove box_syntax from AST and use in tools

Author: clubby789

clippy_lints/src/suspicious_operation_groupings.rs

@@ -596,8 +596,7 @@ fn ident_difference_expr_with_base_location(
         | (MethodCall(_), MethodCall(_))
         | (Call(_, _), Call(_, _))
         | (ConstBlock(_), ConstBlock(_))
-        | (Array(_), Array(_))
-        | (Box(_), Box(_)) => {
+        | (Array(_), Array(_)) => {
             // keep going
         },
         _ => {

clippy_utils/src/ast_utils.rs

@@ -143,7 +143,7 @@ pub fn eq_expr(l: &Expr, r: &Expr) -> bool {
         (Paren(l), _) => eq_expr(l, r),
         (_, Paren(r)) => eq_expr(l, r),
         (Err, Err) => true,
-        (Box(l), Box(r)) | (Try(l), Try(r)) | (Await(l), Await(r)) => eq_expr(l, r),
+        (Try(l), Try(r)) | (Await(l), Await(r)) => eq_expr(l, r),
         (Array(l), Array(r)) => over(l, r, |l, r| eq_expr(l, r)),
         (Tup(l), Tup(r)) => over(l, r, |l, r| eq_expr(l, r)),
         (Repeat(le, ls), Repeat(re, rs)) => eq_expr(le, re) && eq_expr(&ls.value, &rs.value),

clippy_utils/src/sugg.rs

@@ -188,7 +188,6 @@ impl<'a> Sugg<'a> {
         match expr.kind {
             _ if expr.span.ctxt() != ctxt => Sugg::NonParen(snippet_with_context(cx, expr.span, ctxt, default, app).0),
             ast::ExprKind::AddrOf(..)
-            | ast::ExprKind::Box(..)
             | ast::ExprKind::Closure { .. }
             | ast::ExprKind::If(..)
             | ast::ExprKind::Let(..)