Removed 1 unnecessary stubbing in ThingManagerTest.java

[ARUS2023]

Summary

• This is a…
  • [ ] Bug fix
  • [ ] Feature addition
  • [ ] Documentation
  • [X] Refactoring
  • [ ] Minor / simple change (like a typo)
  • [ ] Other
• Describe this change in 1-2 sentences: Removed 1 unnecessary stubbing from ThingManagerTest.firstNonNullThingIsReturned

Problem

Unnecessary stubbings are stubbed method calls that were never realized during test execution. Mockito recommends to remove unnecessary stubbings (https://www.javadoc.io/doc/org.mockito/mockito-core/latest/org/mockito/exceptions/misusing/UnnecessaryStubbingException.html).

• GitHub issue (optional):

Solution

The stubbing is not executed by the test firstNonNullThingIsReturned in the ThingManagerTest.java, therefore we should remove it.

Action