Clippy placation (#2433)

* clippy placation

* clippy placation; cargo fmt

Author: amanjeev

Diff for: bindgen/ir/context.rs

@@ -23,8 +23,7 @@ use crate::clang::{self, Cursor};
 use crate::codegen::CodegenError;
 use crate::BindgenOptions;
 use crate::{Entry, HashMap, HashSet};
-use cexpr;
-use clang_sys;
+
 use proc_macro2::{Ident, Span, TokenStream};
 use quote::ToTokens;
 use std::borrow::Cow;

Diff for: bindgen/ir/function.rs

@@ -10,8 +10,7 @@ use crate::callbacks::{ItemInfo, ItemKind};
 use crate::clang::{self, Attribute};
 use crate::parse::{ClangSubItemParser, ParseError, ParseResult};
 use clang_sys::{self, CXCallingConv};
-use proc_macro2;
-use quote;
+
 use quote::TokenStreamExt;
 use std::io;
 use std::str::FromStr;

Diff for: bindgen/ir/item.rs

@@ -19,9 +19,9 @@ use super::traversal::{EdgeKind, Trace, Tracer};
 use super::ty::{Type, TypeKind};
 use crate::clang;
 use crate::parse::{ClangSubItemParser, ParseError, ParseResult};
-use clang_sys;
+
 use lazycell::LazyCell;
-use regex;
+
 use std::cell::Cell;
 use std::collections::BTreeSet;
 use std::fmt::Write;

Diff for: bindgen/ir/var.rs

@@ -11,7 +11,7 @@ use crate::callbacks::{ItemInfo, ItemKind, MacroParsingBehavior};
 use crate::clang;
 use crate::clang::ClangToken;
 use crate::parse::{ClangSubItemParser, ParseError, ParseResult};
-use cexpr;
+
 use std::io;
 use std::num::Wrapping;