Remove unintentional txt files

Those were mistakenly and automatically generated by the rebaseline-cl tool in
(https://chromium-review.googlesource.com/c/chromium/src/+/1010511).

Change-Id: I5cc9f5dabf56a599883b4d14b57c72befb6584e8
Reviewed-on: https://chromium-review.googlesource.com/1012495
Commit-Queue: Yuqian Li <liyuqian@chromium.org>
Reviewed-by: John Rummell <jrummell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551185}

third_party/WebKit/LayoutTests/platform/mac-retina/virtual/new-remote-playback-pipeline/media/controls/video-enter-exit-fullscreen-while-hovering-shows-controls-expected.txt

-This is a testharness.js-based test.
-FAIL Tests that video controls are shown when entering/exiting fullscreen
-whilst hovering over the controls. Opposite of
-video-enter-exit-fullscreen-without-hovering-doesnt-show-controls.html assert_equals: Fullscreen controls should be hidden by timer expected "0" but got "0.0350492"
-Harness: the test ran to completion.
-

third_party/WebKit/LayoutTests/platform/win7/http/tests/devtools/tracing/timeline-js/compile-script-expected.txt

-Tests the Timeline instrumentation for CompileScript event.
-
-v8.compile Properties:
-{
-    data : {
-        columnNumber : 0
-        lineNumber : 0
-        streamed : <boolean>
-        url : 
-    }
-    endTime : <number>
-    startTime : <number>
-    type : "v8.compile"
-}
-Text details for v8.compile: undefined
-