DEVOPS-4623: Unit tests failures: Exception: Warning: proc_open(): fork failed - Cannot allocate memory

- code review

Author: abeeskau

dev/tests/unit/phpunit.xml.dist

@@ -16,7 +16,6 @@
         <directory suffix="Test.php">../../../app/code/*/*/Test/Unit</directory>
     </testsuite>
     <testsuite name="Magento_Unit_Tests_Other">
-        <directory suffix="Test.php">../../../app/code/*/*/Test/Unit</directory>
         <directory suffix="Test.php">../../../lib/internal/*/*/Test/Unit</directory>
         <directory suffix="Test.php">../../../lib/internal/*/*/*/Test/Unit</directory>
         <directory suffix="Test.php">../../../setup/src/*/*/Test/Unit</directory>