CLI: remove obsolete language feature arguments

These arguments switch language features which cannot be disabled
anymore because they're enabled from some LV not later than 1.4, and the
minimal supported LV is currently 1.4.

jps/jps-common/test/CompilerArgumentsContentProspectorTest.kt

@@ -89,9 +89,6 @@ class CompilerArgumentsContentProspectorTest {
             CommonCompilerArguments::newInference,
             CommonCompilerArguments::inlineClasses,
             CommonCompilerArguments::legacySmartCastAfterTry,
-            CommonCompilerArguments::effectSystem,
-            CommonCompilerArguments::readDeserializedContracts,
-            CommonCompilerArguments::properIeee754Comparisons,
             CommonCompilerArguments::reportPerf,
             CommonCompilerArguments::listPhases,
             CommonCompilerArguments::profilePhases,
@@ -99,7 +96,6 @@ class CompilerArgumentsContentProspectorTest {
             CommonCompilerArguments::checkStickyPhaseConditions,
             CommonCompilerArguments::useK2,
             CommonCompilerArguments::useFirExtendedCheckers,
-            CommonCompilerArguments::useMixedNamedArguments,
             CommonCompilerArguments::metadataKlib,
             CommonCompilerArguments::extendedCompilerChecks,
             CommonCompilerArguments::disableDefaultScriptingPlugin,