refactor: Fix phpstan when delete string key #12756

Job	Run time
Setup PHP Version for Code Coverage	1s
Others (8.3) / Sanity Tests	2m 34s
Others (8.2) / Sanity Tests	3m 30s
Others (8.1) / Sanity Tests	2m 22s
SeparateProcess (8.2) / tests	3m 26s
SeparateProcess (8.1) / tests	3m 15s
SeparateProcess (8.3) / tests	3m 29s
CacheLive (8.1) / Cache Live Tests	1m 59s
CacheLive (8.2) / Cache Live Tests	2m 20s
CacheLive (8.3) / Cache Live Tests	1m 56s
DatabaseLive (8.1, MySQLi, 5.7) / tests	3m 1s
DatabaseLive (8.1, MySQLi, 8.0) / tests	4m 14s
DatabaseLive (8.1, OCI8, 8.0) / tests	5m 47s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 47s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	4m 20s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 16s
DatabaseLive (8.2, OCI8, 8.0) / tests	6m 48s
DatabaseLive (8.2, MySQLi, 8.0) / tests	4m 55s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 22s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 16s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 12s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	4m 45s
DatabaseLive (8.3, OCI8, 8.0) / tests	5m 56s
DatabaseLive (8.3, Postgre, 8.0) / tests	3m 7s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 32s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	4m 41s
Upload coverage results to Coveralls / coveralls	32s
	1h 31m 23s

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