FIR: Get rid of FirRegularClass::setCallbackOnSupertypesComputed

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/declarations/FirJavaClass.kt

@@ -59,8 +59,5 @@ class FirJavaClass internal constructor(
         return this
     }
 
-    override fun setCallbackOnSupertypesComputed(callback: () -> Unit) =
-        error("Supertypes computation should happen just before the instance is published")
-
     override var supertypesComputationStatus = FirClassLikeDeclaration.SupertypesComputationStatus.NOT_COMPUTED
 }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/FirRegularClass.kt

@@ -37,7 +37,6 @@ interface FirRegularClass : FirClass, @VisitedSupertype FirClassLikeDeclaration<
 
     fun replaceSupertypes(newSupertypes: List<FirTypeRef>): FirRegularClass
 
-    fun setCallbackOnSupertypesComputed(callback: () -> Unit)
 }
 
 val FirRegularClass.classId get() = symbol.classId

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/impl/FirClassImpl.kt

@@ -64,8 +64,6 @@ open class FirClassImpl(
     override fun replaceSupertypes(newSupertypes: List<FirTypeRef>): FirRegularClass {
         superTypeRefs.clear()
         superTypeRefs.addAll(newSupertypes)
-        callbackOnSupertypesComputed?.invoke()
-        callbackOnSupertypesComputed = null
         return this
     }
 
@@ -80,11 +78,5 @@ open class FirClassImpl(
         return result
     }
 
-    private var callbackOnSupertypesComputed: (() -> Unit)? = null
-
-    override fun setCallbackOnSupertypesComputed(callback: () -> Unit) {
-        callbackOnSupertypesComputed = callback
-    }
-
     override var supertypesComputationStatus = FirClassLikeDeclaration.SupertypesComputationStatus.NOT_COMPUTED
 }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/impl/FirEnumEntryImpl.kt

@@ -54,17 +54,9 @@ class FirEnumEntryImpl(
     override fun replaceSupertypes(newSupertypes: List<FirTypeRef>): FirRegularClass {
         superTypeRefs.clear()
         superTypeRefs.addAll(newSupertypes)
-        callbackOnSupertypesComputed?.invoke()
-        callbackOnSupertypesComputed = null
         return this
     }
 
-    private var callbackOnSupertypesComputed: (() -> Unit)? = null
-
-    override fun setCallbackOnSupertypesComputed(callback: () -> Unit) {
-        callbackOnSupertypesComputed = callback
-    }
-
     override fun replaceTypeRef(newTypeRef: FirTypeRef) {
         typeRef = newTypeRef
     }