[Chip] Remove unnecessary optional chaining from key event handlers #46752
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sai6855
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Similar to the improvements in PR mui#46752, this removes unnecessary optional chaining from internal handleKeyDown and handleKeyUp function calls in the Chip component. These functions are defined within the same component and are guaranteed to exist, making the optional chaining redundant. The optional chaining for external handlers (handlers.onKeyDown?.) is preserved as it remains necessary.
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In #46263, unnecessary optional chaining was added for
handleKeyDownandhandleKeyUp. These handlers are defined within the component. Optional chaining is only needed for the developer-providedonClick. We can keep the tests from #46263.