[jquery] Remove jQuery.Event(EventLike) signatures and EventLike interface.

These are undocumented and don't appear to be intended to be public.

types/jquery/jquery-tests.ts

@@ -8400,21 +8400,11 @@ function JQuery_Event() {
     function call_signature() {
         // $ExpectType Event<HTMLElement, null> & Coordinates
         $.Event('keydown', $('p').offset());
-
-        // $ExpectType Event<HTMLElement, null> & { type: string; }
-        $.Event({
-            type: 'keydown'
-        });
     }
 
     function constructor() {
         // $ExpectType Event<HTMLElement, null> & Coordinates
         new $.Event('keydown', $('p').offset());
-
-        // $ExpectType Event<HTMLElement, null> & { type: string; }
-        new $.Event({
-            type: 'keydown'
-        });
     }
 
     // https://stackoverflow.com/questions/49892574/trigger-a-jquery-3-event-with-ctrlkey-set

types/jquery/misc.d.ts

@@ -3986,11 +3986,7 @@ $( "input" ).click(function() {
         // tslint:disable-next-line:no-unnecessary-generics
         <T extends object, TTarget extends EventTarget = HTMLElement>(event: string, properties?: T): Event<TTarget> & T;
         // tslint:disable-next-line:no-unnecessary-generics
-        <T extends EventLike, TTarget extends EventTarget = HTMLElement>(properties: T): Event<TTarget> & T;
-        // tslint:disable-next-line:no-unnecessary-generics
         new <T extends object, TTarget extends EventTarget = HTMLElement>(event: string, properties?: T): Event<TTarget> & T;
-        // tslint:disable-next-line:no-unnecessary-generics
-        new <T extends EventLike, TTarget extends EventTarget = HTMLElement>(properties: T): Event<TTarget> & T;
     }
 
     // Instance members
@@ -4712,10 +4708,6 @@ $( "ul" ).click( handler ).find( "ul" ).hide();
         target: TTarget;
     }
 
-    interface EventLike {
-        type: string;
-    }
-
     // #endregion
 
     interface EventHandler<TCurrentTarget, TData = null> extends EventHandlerBase<TCurrentTarget, Event<TCurrentTarget, TData>> { }