Get rid of SuspendFunctionX interfaces

Use a pair of effectively abstract methods in CoroutineImpl instead

core/runtime.jvm/src/kotlin/jvm/internal/CoroutineImpl.kt

@@ -16,7 +16,10 @@
 
 package kotlin.jvm.internal
 
-import kotlin.coroutines.*
+import java.lang.IllegalStateException
+import kotlin.coroutines.Continuation
+import kotlin.coroutines.ContinuationInterceptor
+import kotlin.coroutines.CoroutineContext
 import kotlin.coroutines.intrinsics.SUSPENDED_MARKER
 
 abstract class CoroutineImpl(
@@ -63,4 +66,12 @@ abstract class CoroutineImpl(
     }
 
     protected abstract fun doResume(data: Any?, exception: Throwable?): Any?
+
+    open fun create(completion: Continuation<*>): Continuation<Unit> {
+        throw IllegalStateException("create(Continuation) has not been overridden")
+    }
+
+    open fun create(value: Any?, completion: Continuation<*>): Continuation<Unit> {
+        throw IllegalStateException("create(Any?;Continuation) has not been overridden")
+    }
 }

core/runtime.jvm/src/kotlin/jvm/internal/SuspendFunctions.kt

@@ -1,27 +0,0 @@
-/*
- * Copyright 2010-2016 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package kotlin.jvm.internal
-
-import kotlin.coroutines.Continuation
-
-interface SuspendFunction0<out R> {
-    fun create(resultingContinuation: Continuation<R>): Continuation<Unit>
-}
-
-interface SuspendFunction1<in T, out R> {
-    fun create(value: T, resultingContinuation: Continuation<R>): Continuation<Unit>
-}