Chore: drop stale test/tmp repros for closed #4812/#4810/#4796

[PurHur]

Summary

• Delete three tracked scratch scripts under test/tmp/ left over from long-closed fixes (Language: array spread of non-traversable string — Fatal error not TypeError (zend_execute.c) #4812 array spread string fatal, Language: first-class callable (strlen(...), Foo::bar(...)) must yield Closure objects (zend_compile.c) #4810 FCC→Closure, Stdlib: version_compare() — shorter operand must compare like Zend (ext/standard/versioning.c) #4796 version_compare partial).
• Identical coverage already lives in compliance (array_spread_non_traversable_fatal.phpt, first_class_callable_closure_object.phpt, version_compare_partial.phpt).
• No open issue/PR references these paths (gh search empty).

Test plan

• Confirmed closed issues Language: array spread of non-traversable string — Fatal error not TypeError (zend_execute.c) #4812 / Language: first-class callable (strlen(...), Foo::bar(...)) must yield Closure objects (zend_compile.c) #4810 / Stdlib: version_compare() — shorter operand must compare like Zend (ext/standard/versioning.c) #4796 and compliance supersets
• No open issue/PR path references
• Hygiene-only — no runtime/behavior change

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