Auto merge of #8644 - fitzgen:remove-unused-imports-in-scropt-dom-node, r=eefriedman

Remove two unused imports from components/script/dom/node.rs

Fixes these two compiler warnings:

```
   Compiling servo v0.0.1 (file:///Users/fitzgen/src/servo/components/servo)
/Users/fitzgen/src/servo/components/script/dom/node.rs:26:65: 26:78 warning: unused import, #[warn(unused_imports)] on by default
/Users/fitzgen/src/servo/components/script/dom/node.rs:26 use dom::bindings::inheritance::{Castable, CharacterDataTypeId, ElementTypeId};
                                                                                                                          ^~~~~~~~~~~~~
/Users/fitzgen/src/servo/components/script/dom/node.rs:27:53: 27:70 warning: unused import, #[warn(unused_imports)] on by default
/Users/fitzgen/src/servo/components/script/dom/node.rs:27 use dom::bindings::inheritance::{EventTargetTypeId, HTMLElementTypeId, NodeTypeId};
                                                                                                              ^~~~~~~~~~~~~~~~~
```

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1 files changed, 2 insertions, 2 deletions

diff --git a/components/script/dom/node.rs b/components/script/dom/node.rs
index d6907ae7cac..57e1abd61b1 100644
--- a/components/script/dom/node.rs
+++ b/components/script/dom/node.rs
@@ -23,8 +23,8 @@ use dom::bindings::codegen::UnionTypes::NodeOrString;
 use dom::bindings::conversions::{self, DerivedFrom};
 use dom::bindings::error::{Error, ErrorResult, Fallible};
 use dom::bindings::global::GlobalRef;
-use dom::bindings::inheritance::{Castable, CharacterDataTypeId, ElementTypeId};
-use dom::bindings::inheritance::{EventTargetTypeId, HTMLElementTypeId, NodeTypeId};
+use dom::bindings::inheritance::{Castable, CharacterDataTypeId};
+use dom::bindings::inheritance::{EventTargetTypeId, NodeTypeId};
 use dom::bindings::js::Root;
 use dom::bindings::js::RootedReference;
 use dom::bindings::js::{JS, LayoutJS, MutNullableHeap};