JVM IR: Remove remains of 1.2 coroutines from tests

Remove CoroutineAdapter and LANGUAGE: +ReleaseContinuation,
which are meaninless now.
Update the tests accordingly.

compiler/testData/diagnostics/helpers/coroutines/CoroutineHelpers.kt

@@ -32,17 +32,3 @@ class ResultContinuation : Continuation<Any?> {
 
     var result: Any? = null
 }
-
-abstract class ContinuationAdapter<in T> : Continuation<T> {
-    override val context: CoroutineContext = EmptyCoroutineContext
-    override fun resumeWith(result: Result<T>) {
-        if (result.isSuccess) {
-            resume(result.getOrThrow())
-        } else {
-            resumeWithException(result.exceptionOrNull()!!)
-        }
-    }
-
-    abstract fun resumeWithException(exception: Throwable)
-    abstract fun resume(value: T)
-}

compiler/testData/diagnostics/helpers/coroutines/CoroutineUtil.kt

@@ -3,19 +3,17 @@ package helpers
 import kotlin.coroutines.*
 import kotlin.coroutines.intrinsics.*
 
+
 val StateMachineChecker = StateMachineCheckerClass()
 
-object CheckStateMachineContinuation: ContinuationAdapter<Unit>() {
+object CheckStateMachineContinuation: Continuation<Unit> {
     override val context: CoroutineContext
         get() = EmptyCoroutineContext
 
-    override fun resume(value: Unit) {
+    override fun resumeWith(value: Result<Unit>) {
+        value.getOrThrow()
         StateMachineChecker.proceed = {
             StateMachineChecker.finished = true
         }
     }
-
-    override fun resumeWithException(exception: Throwable) {
-        throw exception
-    }
-}
+}

compiler/testData/diagnostics/tests/coroutines/callableReference/outsideSuspend.kt

@@ -1,6 +1,5 @@
 // FIR_IDENTICAL
 // !CHECK_TYPE
-// !LANGUAGE: +ReleaseCoroutines
 // SKIP_TXT
 
 import kotlin.reflect.KSuspendFunction0

compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReferences.kt

@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +ReleaseCoroutines
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 
 suspend fun foo() {}

compiler/testData/diagnostics/testsWithStdLib/coroutines/modifierFormForNonBuiltInSuspend.kt

@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +ReleaseCoroutines
 // SKIP_TXT
 
 fun <R> suspend(block: suspend () -> R): suspend () -> R = block

compiler/testData/diagnostics/testsWithStdLib/coroutines/modifierFormForNonBuiltInSuspendWithAnyParameter.kt

@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +ReleaseCoroutines
 // SKIP_TXT
 
 fun <R> suspend(block: R) = block

compiler/testData/diagnostics/testsWithStdLib/coroutines/nonModifierFormForBuiltIn.kt

@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +ReleaseCoroutines
 // SKIP_TXT
 
 fun bar() {

compiler/testData/diagnostics/testsWithStdLib/coroutines/nonModifierFormForBuiltInRenameOnImport.fir.kt

@@ -1,4 +1,3 @@
-// !LANGUAGE: +ReleaseCoroutines
 // SKIP_TXT
 
 import kotlin.suspend as suspendLambda

compiler/testData/diagnostics/testsWithStdLib/coroutines/nonModifierFormForBuiltInRenameOnImport.kt

@@ -1,4 +1,3 @@
-// !LANGUAGE: +ReleaseCoroutines
 // SKIP_TXT
 
 import kotlin.suspend as suspendLambda

compiler/testData/diagnostics/testsWithStdLib/coroutines/release/suspend.kt

@@ -1,5 +1,4 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +ReleaseCoroutines
 // SKIP_TXT
 
 suspend fun test() {

compiler/testData/diagnostics/testsWithStdLib/coroutines/restrictSuspension/outerYield_1_3.kt

@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !LANGUAGE: +ReleaseCoroutines +ExperimentalBuilderInference
+// !LANGUAGE: +ExperimentalBuilderInference
 // !OPT_IN: kotlin.RequiresOptIn
 // SKIP_TXT