Drop USE_NEW_INFERENCE, configure language version settings in KotlinTestUtils

This will only have effect for tests which do not use their own instance
of LanguageVersionSettings though

compiler/cli/src/org/jetbrains/kotlin/cli/common/CLICompiler.java

@@ -204,7 +204,7 @@ public abstract class CLICompiler<A extends CommonCompilerArguments> extends CLI
             extraLanguageFeatures.put(LanguageFeature.Coroutines, coroutinesState);
         }
 
-        if (arguments.getNewInference() || configuration.getBoolean(CommonConfigurationKeys.USE_NEW_INFERENCE)) {
+        if (arguments.getNewInference()) {
             extraLanguageFeatures.put(LanguageFeature.NewInference, LanguageFeature.State.ENABLED);
         }
 

compiler/cli/src/org/jetbrains/kotlin/cli/js/K2JSCompiler.java

@@ -204,7 +204,6 @@ public class K2JSCompiler extends CLICompiler<K2JSCompilerArguments> {
         File outputFile = new File(arguments.getOutputFile());
 
         configuration.put(CommonConfigurationKeys.MODULE_NAME, FileUtil.getNameWithoutExtension(outputFile));
-        configuration.put(CommonConfigurationKeys.USE_NEW_INFERENCE, arguments.getNewInference());
 
         JsConfig config = new JsConfig(project, configuration);
         JsConfig.Reporter reporter = new JsConfig.Reporter() {

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/K2JVMCompiler.kt

@@ -355,8 +355,6 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
         }
 
         private fun putAdvancedOptions(configuration: CompilerConfiguration, arguments: K2JVMCompilerArguments) {
-            configuration.put(CommonConfigurationKeys.USE_NEW_INFERENCE, arguments.newInference)
-
             configuration.put(JVMConfigurationKeys.DISABLE_CALL_ASSERTIONS, arguments.noCallAssertions)
             configuration.put(JVMConfigurationKeys.DISABLE_RECEIVER_ASSERTIONS, arguments.noReceiverAssertions)
             configuration.put(JVMConfigurationKeys.DISABLE_PARAM_ASSERTIONS, arguments.noParamAssertions)