[FIR] Get rid of ReturnTypeCalculator in ScopeSession

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/body/resolve/FirImplicitBodyResolve.kt

@@ -37,9 +37,7 @@ class FirImplicitTypeBodyResolveProcessor(
 @AdapterForResolveProcessor
 class FirImplicitTypeBodyResolveTransformerAdapter(session: FirSession, scopeSession: ScopeSession) : FirTransformer<Nothing?>() {
     private val implicitBodyResolveComputationSession = ImplicitBodyResolveComputationSession()
-    private val returnTypeCalculator = ReturnTypeCalculatorWithJump(session, scopeSession, implicitBodyResolveComputationSession).also {
-        scopeSession.returnTypeCalculator = it
-    }
+    private val returnTypeCalculator = ReturnTypeCalculatorWithJump(session, scopeSession, implicitBodyResolveComputationSession)
 
     private val transformer = FirImplicitAwareBodyResolveTransformer(
         session,

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/scopes/impl/FirClassSubstitutionScope.kt

@@ -119,9 +119,6 @@ class FirClassSubstitutionScope(
         }
     }
 
-    private val typeCalculator =
-        (scopeSession.returnTypeCalculator as ReturnTypeCalculator?) ?: ReturnTypeCalculatorForFullBodyResolve()
-
     private fun ConeKotlinType.substitute(): ConeKotlinType? {
         return substitutor.substituteOrNull(this)
     }
@@ -227,7 +224,7 @@ class FirClassSubstitutionScope(
         val receiverType = member.receiverTypeRef?.coneType
         val newReceiverType = receiverType?.substitute(substitutor)
 
-        val returnType = typeCalculator.tryCalculateReturnType(member).type
+        val returnType = member.returnTypeRef.coneType
         val newReturnType = returnType.substitute(substitutor)
         return SubstitutedData(newTypeParameters, newReceiverType, newReturnType, substitutor)
     }
@@ -237,7 +234,7 @@ class FirClassSubstitutionScope(
         val member = original.fir
         if (skipPrivateMembers && member.visibility == Visibilities.Private) return original
 
-        val returnType = typeCalculator.tryCalculateReturnType(member).type
+        val returnType = member.returnTypeRef.coneType
         val newReturnType = returnType.substitute() ?: return original
 
         return createFakeOverrideField(session, member, original, newReturnType, derivedClassId)
@@ -248,7 +245,7 @@ class FirClassSubstitutionScope(
         val member = original.fir as FirSyntheticProperty
         if (skipPrivateMembers && member.visibility == Visibilities.Private) return original
 
-        val returnType = typeCalculator.tryCalculateReturnType(member).type
+        val returnType = member.returnTypeRef.coneType
         val newReturnType = returnType.substitute()
 
         val newParameterTypes = member.getter.valueParameters.map {

compiler/fir/tree/src/org/jetbrains/kotlin/fir/resolve/ScopeSession.kt

@@ -10,8 +10,6 @@ import org.jetbrains.kotlin.fir.PrivateForInline
 class ScopeSession {
     private val scopes = hashMapOf<Any, HashMap<ScopeSessionKey<*, *>, Any>>()
 
-    var returnTypeCalculator: Any? = null
-
     @PrivateForInline
     fun scopes() = scopes