[FIR] Fix missing initialization of backingField for properties from primary constructor

compiler/fir/providers/src/org/jetbrains/kotlin/fir/CopyUtils.kt

@@ -67,54 +67,3 @@ fun FirTypeRef.errorTypeFromPrototype(
         this.diagnostic = diagnostic
     }
 }
-
-fun FirDeclarationStatus.copy(
-    visibility: Visibility? = this.visibility,
-    modality: Modality? = this.modality,
-    isExpect: Boolean = this.isExpect,
-    isActual: Boolean = this.isActual,
-    isOverride: Boolean = this.isOverride,
-    isOperator: Boolean = this.isOperator,
-    isInfix: Boolean = this.isInfix,
-    isInline: Boolean = this.isInline,
-    isTailRec: Boolean = this.isTailRec,
-    isExternal: Boolean = this.isExternal,
-    isConst: Boolean = this.isConst,
-    isLateInit: Boolean = this.isLateInit,
-    isInner: Boolean = this.isInner,
-    isCompanion: Boolean = this.isCompanion,
-    isData: Boolean = this.isData,
-    isSuspend: Boolean = this.isSuspend,
-    isStatic: Boolean = this.isStatic,
-    isFromSealedClass: Boolean = this.isFromSealedClass,
-    isFromEnumClass: Boolean = this.isFromEnumClass,
-    isFun: Boolean = this.isFun,
-): FirDeclarationStatus {
-    val newVisibility = visibility ?: this.visibility
-    val newModality = modality ?: this.modality
-    val newStatus = if (this is FirResolvedDeclarationStatus) {
-        FirResolvedDeclarationStatusImpl(newVisibility, newModality!!, effectiveVisibility)
-    } else {
-        FirDeclarationStatusImpl(newVisibility, newModality)
-    }
-    return newStatus.apply {
-        this.isExpect = isExpect
-        this.isActual = isActual
-        this.isOverride = isOverride
-        this.isOperator = isOperator
-        this.isInfix = isInfix
-        this.isInline = isInline
-        this.isTailRec = isTailRec
-        this.isExternal = isExternal
-        this.isConst = isConst
-        this.isLateInit = isLateInit
-        this.isInner = isInner
-        this.isCompanion = isCompanion
-        this.isData = isData
-        this.isSuspend = isSuspend
-        this.isStatic = isStatic
-        this.isFromSealedClass = isFromSealedClass
-        this.isFromEnumClass = isFromEnumClass
-        this.isFun = isFun
-    }
-}