rm needless code

Author: lengyijun

clippy_lints/src/borrow_deref_ref.rs

@@ -1,10 +1,8 @@
 use crate::reference::DEREF_ADDROF;
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::source::snippet_opt;
-use clippy_utils::source::snippet_with_context;
 use clippy_utils::ty::implements_trait;
 use clippy_utils::{get_parent_expr, is_lint_allowed};
-use rustc_errors::Applicability;
 use rustc_hir::{ExprKind, UnOp};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::mir::Mutability;
@@ -61,9 +59,6 @@ impl LateLintPass<'_> for BorrowDerefRef {
             if !addrof_target.span.from_expansion();
             if let ExprKind::Unary(UnOp::Deref, deref_target) = addrof_target.kind;
             if !deref_target.span.from_expansion();
-            let mut app = Applicability::MachineApplicable;
-            if let (_, false) =snippet_with_context(cx, deref_target.span , e.span.ctxt() , "..", &mut app);
-            if let (_, false) =snippet_with_context(cx, addrof_target.span , e.span.ctxt() , "..", &mut app);
             if !matches!(deref_target.kind, ExprKind::Unary(UnOp::Deref, ..) );
             let ref_ty = cx.typeck_results().expr_ty(deref_target);
             if let ty::Ref(_, inner_ty, Mutability::Not) = ref_ty.kind();