FIR: Drop PossiblyFirFakeOverrideSymbol

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/PossiblyFirFakeOverrideSymbol.kt

@@ -1,11 +0,0 @@
-/*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package org.jetbrains.kotlin.fir.symbols
-
-import org.jetbrains.kotlin.fir.FirSymbolOwner
-import org.jetbrains.kotlin.fir.declarations.FirDeclaration
-
-interface PossiblyFirFakeOverrideSymbol<E, S : FirBasedSymbol<E>> : FirBasedSymbol<E> where E : FirSymbolOwner<E>, E : FirDeclaration

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirFunctionSymbol.kt

@@ -8,7 +8,6 @@ package org.jetbrains.kotlin.fir.symbols.impl
 import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.symbols.AccessorSymbol
 import org.jetbrains.kotlin.fir.symbols.CallableId
-import org.jetbrains.kotlin.fir.symbols.PossiblyFirFakeOverrideSymbol
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
@@ -24,7 +23,7 @@ sealed class FirFunctionSymbol<D : FirFunction<D>>(
 
 open class FirNamedFunctionSymbol(
     callableId: CallableId,
-) : FirFunctionSymbol<FirSimpleFunction>(callableId), PossiblyFirFakeOverrideSymbol<FirSimpleFunction, FirNamedFunctionSymbol>
+) : FirFunctionSymbol<FirSimpleFunction>(callableId)
 
 class FirConstructorSymbol(
     callableId: CallableId

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirVariableSymbol.kt

@@ -12,7 +12,6 @@ import org.jetbrains.kotlin.fir.declarations.FirVariable
 import org.jetbrains.kotlin.fir.diagnostics.ConeDiagnostic
 import org.jetbrains.kotlin.fir.expressions.FirExpression
 import org.jetbrains.kotlin.fir.symbols.CallableId
-import org.jetbrains.kotlin.fir.symbols.PossiblyFirFakeOverrideSymbol
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 
@@ -23,7 +22,7 @@ open class FirVariableSymbol<D : FirVariable<D>>(override val callableId: Callab
 
 open class FirPropertySymbol(
     callableId: CallableId,
-) : FirVariableSymbol<FirProperty>(callableId), PossiblyFirFakeOverrideSymbol<FirProperty, FirPropertySymbol> {
+) : FirVariableSymbol<FirProperty>(callableId) {
     // TODO: should we use this constructor for local variables?
     constructor(name: Name) : this(CallableId(name))
 }