Bootstrap/Load: Remove special handling for `REQUEST_TIME` and...

Bootstrap/Load: Remove special handling for `REQUEST_TIME` and `REQUEST_TIME_FLOAT` server values in `wp_magic_quotes()`.

This was intended as a temporary fix until `add_magic_quotes()` is modified to leave non-string values untouched, which has now been done.

Follow-up to [47370], [48205].

See #48605.
Built from https://develop.svn.wordpress.org/trunk@48206


git-svn-id: https://core.svn.wordpress.org/trunk@47975 1a063a9b-81f0-0310-95a4-ce76da25c4cd