[FE 1.0] Remove CONSTRAINT_SYSTEM_FOR_OVERLOAD_RESOLUTION analysis flag

The constraint system for the old type inference is going to be removed.
Also, `CONSTRAINT_SYSTEM_FOR_OVERLOAD_RESOLUTION` isn't used in the production

compiler/test-infrastructure/tests/org/jetbrains/kotlin/test/builders/LanguageVersionSettingsBuilder.kt

@@ -65,7 +65,6 @@ class LanguageVersionSettingsBuilder {
         val analysisFlags = listOfNotNull(
             analysisFlag(AnalysisFlags.optIn, directives[LanguageSettingsDirectives.OPT_IN].takeIf { it.isNotEmpty() }),
             analysisFlag(AnalysisFlags.ignoreDataFlowInAssert, trueOrNull(LanguageSettingsDirectives.IGNORE_DATA_FLOW_IN_ASSERT in directives)),
-            analysisFlag(AnalysisFlags.constraintSystemForOverloadResolution, directives.singleOrZeroValue(LanguageSettingsDirectives.CONSTRAINT_SYSTEM_FOR_OVERLOAD_RESOLUTION)),
             analysisFlag(AnalysisFlags.allowResultReturnType, trueOrNull(LanguageSettingsDirectives.ALLOW_RESULT_RETURN_TYPE in directives)),
             analysisFlag(AnalysisFlags.explicitApiMode, directives.singleOrZeroValue(LanguageSettingsDirectives.EXPLICIT_API_MODE)),
             analysisFlag(AnalysisFlags.allowKotlinPackage, trueOrNull(LanguageSettingsDirectives.ALLOW_KOTLIN_PACKAGE in directives)),

compiler/test-infrastructure/tests/org/jetbrains/kotlin/test/directives/LanguageSettingsDirectives.kt

@@ -33,10 +33,6 @@ object LanguageSettingsDirectives : SimpleDirectivesContainer() {
         description = "Enables corresponding analysis flag (AnalysisFlags.ignoreDataFlowInAssert)"
     )
 
-    val CONSTRAINT_SYSTEM_FOR_OVERLOAD_RESOLUTION by enumDirective<ConstraintSystemForOverloadResolutionMode>(
-        description = "Configures corresponding analysis flag (AnalysisFlags.constraintSystemForOverloadResolution)",
-    )
-
     val ALLOW_RESULT_RETURN_TYPE by directive(
         description = "Allow using Result in return type position"
     )