Remove duplicate test (iterator_018.phpt)
This is exactly the same as iterator_011.phpt.
Remove duplicate test (offsets_chaining_2.phpt)
This is exactly the same as offsets_chaining_1.phpt.
Remove duplicate test (offsets_chaining_4.phpt)
This is exactly the same as offsets_chaining_3.phpt.
Remove duplicate test (ReflectionObject_export_basic1.phpt)
This is exactly the same as ReflectionObject___toString_basic1.phpt.
Remove duplicate test (ReflectionObject_export_basic2.phpt)
This is exactly the same as ReflectionObject___toString_basic2.phpt.
Closes GH-5467.
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