minor: add unproxy function #2891

Job	Run time
P:8.1, S:6.4.*, D:mysql (dama)	41s
Static Analysis	19s
P:8.1, S:6.4.*, D:mongo	40s
Code Coverage	1m 0s
P:8.2, S:6.4.*, D:mysql (dama)	36s
Build Documentation	16s
P:8.2, S:6.4.*, D:mongo	52s
Test rector rules	29s
P:8.2, S:7.0.*, D:mysql (dama)	42s
Sync meta files	0s
P:8.2, S:7.0.*, D:mongo	46s
P:8, S:5.4.*, D:mysql\|mongo (lowest) (dama)	2m 53s
P:8.2, S:*, D:none	19s
P:8.2, S:*, D:mysql\|mongo (dama)	55s
P:8.2, S:*, D:pgsql\|mongo (dama)	1m 7s
P:8.2, S:*, D:pgsql	2m 10s
P:8.2, S:*, D:sqlite	1m 14s
composer-validate / Validate composer.json	6s
Run php-cs-fixer	0s
	15m 5s

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