Remove useless use crate_name; imports.

A `crate_name::foo` path always works in 2018

components/gfx/platform/freetype/font_list.rs

@@ -12,7 +12,6 @@ use fontconfig::fontconfig::{
     FcFontSetList, FcObjectSetCreate, FcObjectSetDestroy, FcPatternAddString,
 };
 use fontconfig::fontconfig::{FcObjectSetAdd, FcPatternGetInteger};
-use libc;
 use libc::{c_char, c_int};
 use std::ffi::CString;
 use std::ptr;

components/gfx/platform/macos/font_list.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 core_text;
 use crate::text::util::unicode_plane;
 use ucd::{Codepoint, UnicodeBlock};
 

components/gfx/platform/macos/font_template.rs

@@ -5,7 +5,6 @@
 use app_units::Au;
 use core_graphics::data_provider::CGDataProvider;
 use core_graphics::font::CGFont;
-use core_text;
 use core_text::font::CTFont;
 use serde::de::{Error, Visitor};
 use serde::{Deserialize, Deserializer, Serialize, Serializer};

components/gfx/platform/windows/font.rs

@@ -13,7 +13,6 @@ use crate::platform::font_template::FontTemplateData;
 use crate::platform::windows::font_context::FontContextHandle;
 use crate::platform::windows::font_list::font_from_atom;
 use crate::text::glyph::GlyphId;
-use dwrote;
 use dwrote::{Font, FontFace, FontFile};
 use dwrote::{FontStretch, FontStyle};
 use servo_atoms::Atom;
@@ -26,7 +25,6 @@ use style::values::computed::font::FontStyle as StyleFontStyle;
 use style::values::generics::font::FontStyle as GenericFontStyle;
 use style::values::generics::NonNegative;
 use style::values::specified::font::FontStretchKeyword;
-use truetype;
 
 // 1em = 12pt = 16px, assuming 72 points per inch and 96 px per inch
 fn pt_to_px(pt: f64) -> f64 {