JS backend: fix KT-5772 wrong code generated when <,<=,>,>= are used with explicit Comparable type

#KT-5772 Fixed

js/js.libraries/src/core/javalang.kt

@@ -31,11 +31,6 @@ public trait Runnable {
     public open fun run() : Unit;
 }
 
-library
-public trait Comparable<T> {
-    public fun compareTo(that: T): Int
-}
-
 library
 public trait Appendable {
     public open fun append(csq: CharSequence?): Appendable