[FIR] Eliminate unused FirDelegatedTypeRef

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/BuilderConfigurator.kt

@@ -223,10 +223,6 @@ object BuilderConfigurator : AbstractBuilderConfigurator<FirTreeBuilder>(FirTree
             withCopy()
         }
 
-        builder(delegatedTypeRef) {
-            withCopy()
-        }
-
         builder(functionTypeRef) {
             withCopy()
         }
@@ -351,7 +347,7 @@ object BuilderConfigurator : AbstractBuilderConfigurator<FirTreeBuilder>(FirTree
         // -----------------------------------------------------------------------
 
         findImplementationsWithElementInParents(annotationContainer) {
-            it.type !in setOf("FirDelegatedTypeRefImpl", "FirImplicitTypeRefImpl")
+            it.type !in setOf("FirImplicitTypeRefImpl")
         }.forEach {
             it.builder?.parents?.add(annotationContainerBuilder)
         }

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/FirTreeBuilder.kt

@@ -142,7 +142,6 @@ object FirTreeBuilder : AbstractFirTreeBuilder() {
 
     val resolvedTypeRef = element("ResolvedTypeRef", TypeRef, typeRef)
     val errorTypeRef = element("ErrorTypeRef", TypeRef, resolvedTypeRef, diagnosticHolder)
-    val delegatedTypeRef = element("DelegatedTypeRef", TypeRef, typeRef)
     val typeRefWithNullability = element("TypeRefWithNullability", TypeRef, typeRef)
     val userTypeRef = element("UserTypeRef", TypeRef, typeRefWithNullability)
     val dynamicTypeRef = element("DynamicTypeRef", TypeRef, typeRefWithNullability)

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/ImplementationConfigurator.kt

@@ -434,14 +434,6 @@ object ImplementationConfigurator : AbstractFirTreeImplementationConfigurator()
             kind = OpenClass
         }
 
-        impl(delegatedTypeRef) {
-            listOf("source", "annotations").forEach {
-                default(it) {
-                    delegate = "typeRef"
-                }
-            }
-        }
-
         impl(safeCallExpression) {
             useTypes(safeCallCheckedSubjectType)
         }
@@ -462,7 +454,6 @@ object ImplementationConfigurator : AbstractFirTreeImplementationConfigurator()
         }
 
         val implementationWithConfigurableTypeRef = listOf(
-            "FirDelegatedTypeRefImpl",
             "FirTypeProjectionWithVarianceImpl",
             "FirCallableReferenceAccessImpl",
             "FirThisReceiverExpressionImpl",

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/NodeConfigurator.kt

@@ -564,11 +564,6 @@ object NodeConfigurator : AbstractFieldConfigurator<FirTreeBuilder>(FirTreeBuild
             +booleanField("isSuspend")
         }
 
-        delegatedTypeRef.configure {
-            +field("delegate", expression, nullable = true)
-            +field(typeRef)
-        }
-
         typeRefWithNullability.configure {
             +booleanField("isMarkedNullable")
         }