Don't re-export clippy_utils::*

clippy_lints/src/drop_forget_ref.rs

@@ -1,6 +1,6 @@
-use crate::utils::{match_def_path, paths};
 use clippy_utils::diagnostics::span_lint_and_note;
 use clippy_utils::ty::is_copy;
+use clippy_utils::{match_def_path, paths};
 use if_chain::if_chain;
 use rustc_hir::{Expr, ExprKind};
 use rustc_lint::{LateContext, LateLintPass};