[Extensions] Remove runtime.PlatformOs.FUCHSIA

Remove constant enum value from WebExtensions API called
chrome.runtime.PlatformOs.FUCHSIA which is equal to 'fuchsia'.
This enum value was added when Chrome was implementing support
for WebExtensions on Fuchsia and CL 3602643 added Fuchsia support
in chrome.runtime.getPlatformInfo() and the enum. Later CL 5512530
removed Fuchsia from chrome.runtime.getPlatformInfo(), but not enum.

Bug: 41481724
Change-Id: Iebad2b5714c78da1272219afe270fae5efdb4b52
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6788378
Reviewed-by: Devlin Cronin <[email protected]>
Commit-Queue: Anton Bershanskyi <[email protected]>
Reviewed-by: Oliver Dunk <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1499204}
NOKEYCHECK=True
GitOrigin-RevId: 77a4f5f4cad2256b66df05c9feac474a74b1ff74
1 file changed