FIR: Remove unused FirInferenceSession.addErrorCall

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/inference/AbstractManyCandidatesInferenceSession.kt

@@ -38,17 +38,12 @@ abstract class AbstractManyCandidatesInferenceSession(
         partiallyResolvedCalls += call to call.candidate
     }
 
-    final override fun <T> addErrorCall(call: T) where T : FirResolvable, T : FirStatement {
-        errorCalls += call
-    }
-
     override fun registerStubTypes(map: Map<TypeVariableMarker, StubTypeMarker>) {}
 
     protected val FirResolvable.candidate: Candidate
         get() = candidate()!!
 
     override fun clear() {
-        errorCalls.clear()
         partiallyResolvedCalls.clear()
         completedCalls.clear()
     }

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/inference/FirInferenceSession.kt

@@ -28,7 +28,6 @@ abstract class FirInferenceSession {
     abstract val currentConstraintSystem: ConstraintStorage
 
     abstract fun <T> addPartiallyResolvedCall(call: T) where T : FirResolvable, T : FirStatement
-    abstract fun <T> addErrorCall(call: T) where T : FirResolvable, T : FirStatement
     abstract fun <T> addCompletedCall(call: T, candidate: Candidate) where T : FirResolvable, T : FirStatement
 
     abstract fun registerStubTypes(map: Map<TypeVariableMarker, StubTypeMarker>)
@@ -57,7 +56,6 @@ abstract class FirStubInferenceSession : FirInferenceSession() {
         get() = ConstraintStorage.Empty
 
     override fun <T> addPartiallyResolvedCall(call: T) where T : FirResolvable, T : FirStatement {}
-    override fun <T> addErrorCall(call: T) where T : FirResolvable, T : FirStatement {}
     override fun <T> addCompletedCall(call: T, candidate: Candidate) where T : FirResolvable, T : FirStatement {}
 
     override fun inferPostponedVariables(