Revert "[iOS] Add Tab Grid Item Context Menu Share Action EGTest"

This reverts commit 8ce8356c55d388a2786f8152f13bbbf4dd6cdca2.

Reason for revert: Landed on the wrong branch

Original change's description:
> [iOS] Add Tab Grid Item Context Menu Share Action EGTest
>
> Bug: 1202945
> Change-Id: I514c71510773eb79698ca79660f337957b92abe3
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2852504
> Reviewed-by: edchin <[email protected]>
> Reviewed-by: Mohammad Refaat <[email protected]>

Bug: 1202945
Change-Id: I9d366fcd9d6c0980fc14075883346b33d621ecbe
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2857445
Auto-Submit: Mohammad Refaat <[email protected]>
Reviewed-by: edchin <[email protected]>

• ios/chrome/browser/ui/tab_switcher/tab_grid/tab_grid_egtest.mm[diff]