Remove monkey-patched Array.prototype.first() and last() methods
This MR removes non-standard Array.prototype methods from the codebase. Monkey-patching built-in objects for any purpose other than polyfills and shims is a bad practice.
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This MR removes non-standard Array.prototype methods from the codebase. Monkey-patching built-in objects for any purpose other than polyfills and shims is a bad practice.