Remove API_VERSION 1.3 from compiler tests

So that these tests will now check behavior on the latest API version

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

@@ -1,6 +1,6 @@
 // !LANGUAGE: +ReleaseCoroutines
-// !API_VERSION: 1.3
 // !DIAGNOSTICS: -UNUSED_VARIABLE
+
 suspend fun foo() {}
 
 class A {

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

@@ -1,5 +1,4 @@
 // !LANGUAGE: +ReleaseCoroutines
-// !API_VERSION: 1.3
 // SKIP_TXT
 
 fun <R> suspend(block: suspend () -> R): suspend () -> R = block

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

@@ -1,5 +1,4 @@
 // !LANGUAGE: +ReleaseCoroutines
-// !API_VERSION: 1.3
 // SKIP_TXT
 
 fun <R> suspend(block: R) = block

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

@@ -1,6 +1,6 @@
 // !LANGUAGE: +ReleaseCoroutines
-// !API_VERSION: 1.3
 // SKIP_TXT
+
 fun bar() {
     suspend {
         println()

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

@@ -1,6 +1,6 @@
 // !LANGUAGE: +ReleaseCoroutines
-// !API_VERSION: 1.3
 // SKIP_TXT
+
 import kotlin.suspend as suspendLambda
 
 fun bar() {

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

@@ -1,4 +1,3 @@
-// !API_VERSION: 1.3
 // !LANGUAGE: +ReleaseCoroutines
 // SKIP_TXT
 
@@ -6,4 +5,4 @@ import kotlin.coroutines.experimental.coroutineContext
 
 suspend fun test() {
     <!UNSUPPORTED!>coroutineContext<!>
-}
+}

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

@@ -1,7 +1,6 @@
-// !API_VERSION: 1.3
 // !LANGUAGE: +ReleaseCoroutines
 // SKIP_TXT
 
 suspend fun test() {
     suspend {}
-}
+}

compiler/testData/diagnostics/testsWithStdLib/experimental/experimentalUnsignedLiterals.kt

@@ -1,5 +1,4 @@
 // !USE_EXPERIMENTAL: kotlin.Experimental
-// !API_VERSION: 1.3
 // !DIAGNOSTICS: -UNUSED_EXPRESSION, -UNUSED_VARIABLE, -UNUSED_PARAMETER
 
 fun test() {