remove extern crate (#30311)

* remove extern crate

* Update components/script_plugins/lib.rs

Co-authored-by: Martin Robinson <mrobinson@igalia.com>

---------

Co-authored-by: Martin Robinson <mrobinson@igalia.com>

components/layout_2020/fragment_tree/base_fragment.rs

@@ -5,6 +5,7 @@
 use crate::layout_debug::DebugId;
 use bitflags::bitflags;
 use gfx_traits::{combine_id_with_fragment_type, FragmentType};
+use serde::Serialize;
 use style::dom::OpaqueNode;
 use style::selector_parser::PseudoElement;
 

components/layout_2020/fragment_tree/box_fragment.rs

@@ -7,6 +7,7 @@ use crate::cell::ArcRefCell;
 use crate::geom::flow_relative::{Rect, Sides};
 use crate::geom::{PhysicalPoint, PhysicalRect, PhysicalSides, PhysicalSize};
 use gfx_traits::print_tree::PrintTree;
+use serde::Serialize;
 use servo_arc::Arc as ServoArc;
 use style::computed_values::overflow_x::T as ComputedOverflow;
 use style::computed_values::position::T as ComputedPosition;

components/layout_2020/fragment_tree/fragment.rs

@@ -11,6 +11,7 @@ use gfx::font::FontMetrics as GfxFontMetrics;
 use gfx::text::glyph::GlyphStore;
 use gfx_traits::print_tree::PrintTree;
 use msg::constellation_msg::{BrowsingContextId, PipelineId};
+use serde::Serialize;
 use servo_arc::Arc as ServoArc;
 use std::sync::Arc;
 use style::logical_geometry::WritingMode;

components/layout_2020/fragment_tree/fragment_tree.rs

@@ -11,6 +11,7 @@ use app_units::Au;
 use euclid::default::{Point2D, Rect, Size2D};
 use fxhash::FxHashSet;
 use gfx_traits::print_tree::PrintTree;
+use serde::Serialize;
 use style::animation::AnimationSetKey;
 use style::dom::OpaqueNode;
 use style::values::computed::Length;

components/layout_2020/fragment_tree/hoisted_shared_fragment.rs

@@ -4,6 +4,7 @@
 
 use super::Fragment;
 use crate::{cell::ArcRefCell, geom::flow_relative::Vec2};
+use serde::Serialize;
 use style::values::computed::{Length, LengthPercentage};
 
 /// A reference to a Fragment which is shared between `HoistedAbsolutelyPositionedBox`