Remove click handler for the link in the password generation popup

The link has already been removed, both on desktop and Android, but
the click handler was not.

Note: On Android, the popup is now used only to display the help text.

Bug: 862269
Change-Id: Ie6fbe83c45b029fccb4fd32d228a53bdd527d5f0
Reviewed-on: https://chromium-review.googlesource.com/c/1409451
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Commit-Queue: Ioana Pandele <ioanap@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623174}
9 files changed