use if_chain::if_chain;
-use rustc::declare_lint_pass;
-use rustc::lint::{LateContext, LateLintPass, LintArray, LintPass};
+use rustc::lint::{LateContext, LateLintPass};
use rustc_hir::*;
-use rustc_session::declare_tool_lint;
+use rustc_session::{declare_lint_pass, declare_tool_lint};
use crate::utils::{is_must_use_func_call, is_must_use_ty, span_help_and_lint};