Remove more unnecessary imports (#521)

Author: djc

html5ever/examples/noop-tokenize.rs

@@ -11,7 +11,6 @@
 
 extern crate html5ever;
 
-use std::default::Default;
 use std::io;
 
 use html5ever::tendril::*;

html5ever/examples/noop-tree-builder.rs

@@ -12,7 +12,6 @@ extern crate html5ever;
 
 use std::borrow::Cow;
 use std::collections::HashMap;
-use std::default::Default;
 use std::io;
 
 use html5ever::parse_document;

html5ever/examples/print-tree-actions.rs

@@ -12,7 +12,6 @@ extern crate html5ever;
 
 use std::borrow::Cow;
 use std::collections::HashMap;
-use std::default::Default;
 use std::io;
 
 use html5ever::parse_document;

html5ever/examples/tokenize.rs

@@ -9,7 +9,6 @@
 
 extern crate html5ever;
 
-use std::default::Default;
 use std::io;
 
 use html5ever::tendril::*;

html5ever/src/serialize/mod.rs

@@ -10,7 +10,6 @@
 use log::warn;
 pub use markup5ever::serialize::{AttrRef, Serialize, Serializer, TraversalScope};
 use markup5ever::{local_name, namespace_url, ns};
-use std::default::Default;
 use std::io::{self, Write};
 
 use crate::{LocalName, QualName};

html5ever/src/tree_builder/mod.rs

@@ -26,7 +26,6 @@ use crate::tokenizer::{Doctype, EndTag, StartTag, Tag, TokenSink, TokenSinkResul
 
 use std::borrow::Cow::Borrowed;
 use std::collections::VecDeque;
-use std::default::Default;
 use std::iter::{Enumerate, Rev};
 use std::mem::replace;
 use std::{fmt, slice};

rcdom/examples/hello_xml.rs

@@ -11,8 +11,6 @@
 extern crate markup5ever_rcdom as rcdom;
 extern crate xml5ever;
 
-use std::default::Default;
-
 use rcdom::{NodeData, RcDom};
 use xml5ever::driver::parse_document;
 use xml5ever::tendril::TendrilSink;

rcdom/examples/html2html.rs

@@ -18,7 +18,6 @@
 extern crate html5ever;
 extern crate markup5ever_rcdom as rcdom;
 
-use std::default::Default;
 use std::io::{self, Write};
 
 use html5ever::driver::ParseOpts;

rcdom/examples/print-rcdom.rs

@@ -11,7 +11,6 @@
 extern crate html5ever;
 extern crate markup5ever_rcdom as rcdom;
 
-use std::default::Default;
 use std::io;
 
 use html5ever::parse_document;

rcdom/examples/xml_tree_printer.rs

@@ -11,9 +11,7 @@
 extern crate markup5ever_rcdom as rcdom;
 extern crate xml5ever;
 
-use std::default::Default;
 use std::io;
-use std::string::String;
 
 use rcdom::{Handle, NodeData, RcDom};
 use xml5ever::driver::parse_document;