[librsvg] Remove unused imports

[Federico Mena Quintero <federico src gnome org>]

commit 41dafe6f0f7bf290e01939c02527cb2e68896a4a
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Mar 26 16:21:08 2019 -0600

    Remove unused imports

 librsvg_crate/tests/intrinsic_dimensions.rs | 3 ---
 librsvg_crate/tests/primitives.rs           | 6 ------
 librsvg_crate/tests/render_to_viewport.rs   | 6 +-----
 3 files changed, 1 insertion(+), 14 deletions(-)
---
diff --git a/librsvg_crate/tests/intrinsic_dimensions.rs b/librsvg_crate/tests/intrinsic_dimensions.rs
index 3b969ca6..7d0d28a1 100644
--- a/librsvg_crate/tests/intrinsic_dimensions.rs
+++ b/librsvg_crate/tests/intrinsic_dimensions.rs
@@ -1,7 +1,4 @@
 use cairo;
-use gio;
-use glib;
-use librsvg;
 
 use librsvg::{
     CairoRenderer,
diff --git a/librsvg_crate/tests/primitives.rs b/librsvg_crate/tests/primitives.rs
index d88ff6c0..f5d289b0 100644
--- a/librsvg_crate/tests/primitives.rs
+++ b/librsvg_crate/tests/primitives.rs
@@ -1,8 +1,4 @@
 use cairo;
-use gio;
-use glib;
-use librsvg;
-use rsvg_internals;
 
 mod utils;
 
@@ -10,8 +6,6 @@ use rsvg_internals::surface_utils::shared_surface::{SharedImageSurface, SurfaceT
 
 use self::utils::{load_svg, render_to_viewport, compare_to_surface, SurfaceSize};
 
-use std::fs::File;
-
 #[test]
 fn simple_opacity_with_transform() {
     let svg = load_svg(
diff --git a/librsvg_crate/tests/render_to_viewport.rs b/librsvg_crate/tests/render_to_viewport.rs
index 74e6f0fb..dc011b82 100644
--- a/librsvg_crate/tests/render_to_viewport.rs
+++ b/librsvg_crate/tests/render_to_viewport.rs
@@ -1,14 +1,10 @@
 use cairo;
-use gio;
-use glib;
-use librsvg;
-use rsvg_internals;
 
 mod utils;
 
 use rsvg_internals::surface_utils::shared_surface::{SharedImageSurface, SurfaceType};
 
-use self::utils::{compare_to_file, compare_to_surface, load_svg, render_to_viewport, SurfaceSize};
+use self::utils::{compare_to_surface, load_svg, render_to_viewport, SurfaceSize};
 
 #[test]
 fn render_to_viewport_with_different_size() {