fix(jqLite): fix memory leaking in IE8 (remove monkey patched methods on Event)
fix(jqLite): fix memory leaking in IE8 (remove monkey patched methods on Event)

These methods cause IE8 holds the whole jqLite in the memory, even when page is reloaded.
jqLite's cache keeps element's data (event handlers, attached scopes, injector, etc…), so almost all used memory is never released in IE8.

jQuery creates its own Event object (wrapper around native Event) instead.
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