Fix warnings.

3 jobs for update-text_box in 1 minute and 54 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Build
passed #15855
build:linux

00:00:58

failed #15856
build:redox

00:01:54

 
  Test
skipped #15857
test:linux
 
Name Stage Failure
failed
build:redox Build
   |

error: aborting due to previous error

For more information about this error, try `rustc --explain E0425`.
error: Could not compile `rayon-core`.
warning: build failed, waiting for other jobs to finish...
error: build failed
ERROR: Job failed: exit code 1