[iOS] Remove FadeTruncatedLabel

The file wasn't used.

Bug: 944008
Change-Id: I19ad91e7cd0b01bca01e6db65d5b3f1b32015086
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1532220
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#642489}
3 files changed