Bug 1557721 - Remove unneeded return statement. r=kvark

[wrupdater] From https://github.com/servo/webrender/pull/3667

Differential Revision: https://phabricator.services.mozilla.com/D34159

--HG--
extra : moz-landing-system : lando

gfx/wr/webrender/src/screen_capture.rs

@@ -63,13 +63,13 @@ pub(in crate) struct AsyncScreenshotGrabber {
 
 impl Default for AsyncScreenshotGrabber {
     fn default() -> Self {
-        return AsyncScreenshotGrabber {
+        AsyncScreenshotGrabber {
             scaling_textures: Vec::new(),
             available_pbos: Vec::new(),
             awaiting_readback: HashMap::new(),
             next_pbo_handle: 1,
             mode: AsyncScreenshotGrabberMode::ProfilerScreenshots,
-        };
+        }
     }
 }
 

gfx/wr/webrender/src/texture_cache.rs

@@ -680,7 +680,7 @@ impl TextureCache {
     }
 
     pub fn requires_frame_build(&self) -> bool {
-        return self.require_frame_build;
+        self.require_frame_build
     }
 
     /// Called at the beginning of each frame.

gfx/wr/wr_malloc_size_of/lib.rs

@@ -54,7 +54,7 @@ impl MallocSizeOfOps {
         // larger than the required alignment, but small enough that it is
         // always in the first page of memory and therefore not a legitimate
         // address.
-        return ptr as *const usize as usize <= 256;
+        ptr as *const usize as usize <= 256
     }
 
     /// Call `size_of_op` on `ptr`, first checking that the allocation isn't