Auto merge of #8946 - Ms2ger:warnings, r=jdm

Remove unused imports.

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/8946)
<!-- Reviewable:end -->

components/gfx/font_context.rs

@@ -17,7 +17,6 @@ use platform::font::FontHandle;
 use platform::font_context::FontContextHandle;
 use platform::font_template::FontTemplateData;
 use smallvec::SmallVec;
-use std::borrow::{self, ToOwned};
 use std::cell::RefCell;
 use std::collections::HashMap;
 use std::collections::hash_state::DefaultState;

components/script/dom/closeevent.rs

@@ -4,7 +4,6 @@
 
 use dom::bindings::codegen::Bindings::CloseEventBinding;
 use dom::bindings::codegen::Bindings::CloseEventBinding::CloseEventMethods;
-use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
 use dom::bindings::error::Fallible;
 use dom::bindings::global::GlobalRef;
 use dom::bindings::inheritance::Castable;

components/script/dom/customevent.rs

@@ -4,7 +4,6 @@
 
 use dom::bindings::codegen::Bindings::CustomEventBinding;
 use dom::bindings::codegen::Bindings::CustomEventBinding::CustomEventMethods;
-use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
 use dom::bindings::error::Fallible;
 use dom::bindings::global::GlobalRef;
 use dom::bindings::inheritance::Castable;

components/script/dom/errorevent.rs

@@ -5,7 +5,6 @@
 use dom::bindings::cell::DOMRefCell;
 use dom::bindings::codegen::Bindings::ErrorEventBinding;
 use dom::bindings::codegen::Bindings::ErrorEventBinding::ErrorEventMethods;
-use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
 use dom::bindings::error::Fallible;
 use dom::bindings::global::GlobalRef;
 use dom::bindings::inheritance::Castable;

components/script/dom/messageevent.rs

@@ -2,7 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
 use dom::bindings::codegen::Bindings::MessageEventBinding;
 use dom::bindings::codegen::Bindings::MessageEventBinding::MessageEventMethods;
 use dom::bindings::error::Fallible;

components/script/dom/progressevent.rs

@@ -2,7 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
 use dom::bindings::codegen::Bindings::ProgressEventBinding;
 use dom::bindings::codegen::Bindings::ProgressEventBinding::ProgressEventMethods;
 use dom::bindings::error::Fallible;

components/script/dom/storageevent.rs

@@ -2,7 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use dom::bindings::codegen::Bindings::EventBinding::{EventMethods};
 use dom::bindings::codegen::Bindings::StorageEventBinding;
 use dom::bindings::codegen::Bindings::StorageEventBinding::{StorageEventMethods};
 use dom::bindings::error::Fallible;

components/script/dom/uievent.rs

@@ -2,7 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
 use dom::bindings::codegen::Bindings::UIEventBinding;
 use dom::bindings::codegen::Bindings::UIEventBinding::UIEventMethods;
 use dom::bindings::error::Fallible;

components/script/dom/webglcontextevent.rs

@@ -2,7 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
 use dom::bindings::codegen::Bindings::WebGLContextEventBinding;
 use dom::bindings::codegen::Bindings::WebGLContextEventBinding::WebGLContextEventInit;
 use dom::bindings::codegen::Bindings::WebGLContextEventBinding::WebGLContextEventMethods;

components/script/dom/xmlhttprequest.rs

@@ -784,7 +784,6 @@ pub type TrustedXHRAddress = Trusted<XMLHttpRequest>;
 
 impl XMLHttpRequest {
     fn change_ready_state(&self, rs: XMLHttpRequestState) {
-        use string_cache::Atom;
         assert!(self.ready_state.get() != rs);
         self.ready_state.set(rs);
         let global = self.global.root();