Remove experimental coroutines opt-in from build scripts

It has no effect in Kotlin 1.3

Only enable coroutines if '-ReleaseCoroutines' is used

libraries/stdlib/common/build.gradle

@@ -72,6 +72,7 @@ compileCoroutinesKotlinCommon {
                 "-module-name", project.name+"-coroutines",
                 "-Xuse-experimental=kotlin.contracts.ExperimentalContracts",
                 "-Xuse-experimental=kotlin.Experimental",
+                "-Xcoroutines=enable",
                 "-XXLanguage:-ReleaseCoroutines",
                 "-Xallow-kotlin-package",
                 "-Xallow-result-return-type"
@@ -87,8 +88,6 @@ compileTestKotlinCommon {
     }
 }
 
-kotlin.experimental.coroutines 'enable'
-
 jar {
     manifestAttributes(manifest, project, 'Main')
     from sourceSets.coroutines.output

libraries/stdlib/jdk7/build.gradle

@@ -86,8 +86,6 @@ compileTestKotlin {
 
 compileJava9Sources(project, 'kotlin.stdlib.jdk7')
 
-kotlin.experimental.coroutines 'enable'
-
 test {
     executable = "$JDK_17/bin/java"
 }

libraries/stdlib/jdk8/build.gradle

@@ -89,8 +89,6 @@ compileTestKotlin {
 
 compileJava9Sources(project, 'kotlin.stdlib.jdk8')
 
-kotlin.experimental.coroutines 'enable'
-
 test {
     executable = "$JDK_18/bin/java"
 }

libraries/stdlib/jre7/build.gradle

@@ -71,8 +71,6 @@ compileTestKotlin {
     kotlinOptions.freeCompilerArgs = ["-Xallow-kotlin-package", "-Xmulti-platform", "-XXLanguage:+ReleaseCoroutines", "-Xuse-experimental=kotlin.ExperimentalUnsignedTypes"]
 }
 
-kotlin.experimental.coroutines 'enable'
-
 test {
     executable = "$JDK_17/bin/java"
 }

libraries/stdlib/jre8/build.gradle

@@ -74,8 +74,6 @@ compileTestKotlin {
     kotlinOptions.freeCompilerArgs = ["-Xallow-kotlin-package", "-Xnormalize-constructor-calls=enable", "-Xmulti-platform", "-XXLanguage:+ReleaseCoroutines", "-Xuse-experimental=kotlin.ExperimentalUnsignedTypes"]
 }
 
-kotlin.experimental.coroutines 'enable'
-
 test {
     executable = "$JDK_18/bin/java"
 }

libraries/stdlib/js/build.gradle

@@ -122,8 +122,6 @@ task prepareBuiltinsSources(type: Copy) {
     into builtinsSrcDir
 }
 
-kotlin.experimental.coroutines "enable"
-
 tasks.withType(org.jetbrains.kotlin.gradle.tasks.Kotlin2JsCompile) {
     kotlinOptions {
         main = "noCall"
@@ -185,6 +183,7 @@ compileCoroutinesKotlin2Js {
         freeCompilerArgs += [
             "-Xuse-experimental=kotlin.contracts.ExperimentalContracts",
             "-Xuse-experimental=kotlin.Experimental",
+            "-Xcoroutines=enable",
             "-XXLanguage:-ReleaseCoroutines"
         ]
     }

libraries/stdlib/jvm/build.gradle

@@ -212,6 +212,7 @@ compileCoroutinesKotlin {
                 "-Xmultifile-parts-inherit",
                 "-Xuse-experimental=kotlin.contracts.ExperimentalContracts",
                 "-Xuse-experimental=kotlin.Experimental",
+                "-Xcoroutines=enable",
                 "-XXLanguage:-ReleaseCoroutines",
                 "-module-name", "kotlin-stdlib-coroutines"
         ]
@@ -264,5 +265,3 @@ test {
         systemProperty("kotlin.stdlib.test.long.sequences", "true")
     }
 }
-
-kotlin.experimental.coroutines 'enable'

libraries/stdlib/samples/build.gradle

@@ -14,8 +14,6 @@ compileTestKotlin {
     kotlinOptions.freeCompilerArgs += ["-XXLanguage:+ReleaseCoroutines"]
 }
 
-kotlin.experimental.coroutines 'enable'
-
 test {
     executable = "$JDK_18/bin/java"
 }