Get_magic_quotes_gpc() is deprecated since php 7.4

[mpally]

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Error message in the php error log

In backend.php on line 7

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[fox]

@mpally

In backend.php on line 7

commit 0697eca0e111a194f15f12025ee1859b0f32843b
Author: Andrew Dolgov <noreply@fakecake.org>
Date:   Fri Dec 6 07:34:50 2019 +0300

    remove testing for get_magic_quotes_gpc: deprecated in php7.4, apparently not working since php 5.4

it sure takes someone special to report an issue for something that has been removed 4 years ago.

[mpally]

Sorry for this, I picked a wrong file