Revert "'yield' reserved as a keyword"

This reverts commit 434082cadb.

js/js.translator/testData/reservedWords/cases/delegatedFunParamInterface.kt

@@ -0,0 +1,26 @@
+package foo
+
+// NOTE THIS FILE IS AUTO-GENERATED by the generateTestDataForReservedWords.kt. DO NOT EDIT!
+
+interface Trait {
+    fun foo(`interface`: String)
+}
+
+class TraitImpl : Trait {
+    override fun foo(`interface`: String) {
+    assertEquals("123", `interface`)
+    testRenamed("interface", { `interface` })
+}
+}
+
+class TestDelegate : Trait by TraitImpl() {
+    fun test() {
+        foo("123")
+    }
+}
+
+fun box(): String {
+    TestDelegate().test()
+
+    return "OK"
+}