[FIR] Make FirErrorConstructor a FirDiagnosticHolder

compiler/fir/semantics/src/org/jetbrains/kotlin/fir/resolve/diagnostics/ConeDiagnostics.kt

@@ -82,10 +82,6 @@ class ConeFunctionExpectedError(val expression: String, val type: ConeKotlinType
     override val reason: String get() = "Expression '$expression' of type '$type' cannot be invoked as a function"
 }
 
-object ConeNoConstructorError : ConeDiagnostic {
-    override val reason: String get() = "This type does not have a constructor"
-}
-
 class ConeResolutionToClassifierError(
     override val candidate: AbstractCandidate,
     override val candidateSymbol: FirRegularClassSymbol