Drop an unused and redundant phpunit.xml

There already is a `phpunit.xml` in the project root, and there is no need to have another copy in `tests/`. Fixes MyIntervals#229
raxbg · Sep 15, 2022 · 4a78df5 · 4a78df5
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commit 4a78df5
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diff --git a/tests/phpunit.xml b/tests/phpunit.xml