Delete edugain.xml #327

Job	Run time
Linter / json-linter	27s
PHP-Linter (8.4) / linter	12s
PHP-Linter (8.5) / linter	14s
Linter / yaml-linter	7s
PHP-Linter (8.3) / linter	11s
Linter / ecmascript-linter	0s
Linter / style-linter	0s
Unit tests, PHP 8.5, windows-latest	1m 16s
Unit tests, PHP 8.4, windows-latest	1m 5s
Unit tests, PHP 8.5, ubuntu-latest	20s
Unit tests, PHP 8.3, windows-latest	1m 2s
Unit tests, PHP 8.3, ubuntu-latest	23s
Unit tests, PHP 8.4, ubuntu-latest	19s
Security checks	28s
Code coverage	11s
Quality control	35s
Cleanup artifacts	3s
	6m 53s

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