Object Deletion

Ok so I have this game where I can place objects but when I don't have a object to place in hand I want to be able to delete them with a key. So I tried but doesn't respond… any ideas? Look at the if(objectplace == false) part...

 using UnityEngine;
 using System.Collections;
 
 public class Placement : MonoBehaviour
 {
     public bool objectplace = false, newobjectselected = false;
     public GameObject block;
     private int permanentLayer = 20;
     private GameObject nextToPlace;
     
     void Update ()
     {
         if(objectplace == true)
         {
             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             RaycastHit hit;
 
             if (Physics.Raycast(ray, out hit, 14, 1 << permanentLayer))
             {
                   float snap = 0.25f;
                 Vector3 snapped = new Vector3(Mathf.RoundToInt(hit.point.x/snap)*snap, Mathf.RoundToInt(hit.point.y/snap)*snap, Mathf.RoundToInt(hit.point.z/snap)*snap);
                 nextToPlace.transform.position = snapped;
                 if(Input.GetKeyDown("right"))
                 {
                     nextToPlace.transform.Rotate(0,90,0);
                 }
                 if(Input.GetKeyDown("left"))
                 {
                     nextToPlace.transform.Rotate(0,-90,0);
                 }
                   nextToPlace.SetActive(true);
                   if (Input.GetButtonDown("Fire1"))
                   {
                     nextToPlace.layer = permanentLayer; // place it, so we can put things on top
                     // get a new one:
                     nextToPlace = Instantiate(block, Vector3.zero, Quaternion.identity) as GameObject;
                     nextToPlace.SetActive(false);
                     objectplace = false;
                   }
             }
             else
             {
                   nextToPlace.SetActive(false);
             }
         }
         if(objectplace == false)
         {
             if (Input.GetButtonDown("Fire1"))
               {
                 Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
                 RaycastHit hit;
 
                 if (Physics.Raycast(ray, out hit, 14) && hit.transform.CompareTag("[Item]"))
                 {
                     if(Input.GetKeyDown("g"))
                     {
                         Destroy(hit.transform);
                     }
                 }
               }
         }
     }
 
     void LateUpdate()
     {
         if(newobjectselected == true)
         {
             Destroy(nextToPlace);
             nextToPlace = Instantiate(block, Vector3.zero, Quaternion.identity) as GameObject;
             nextToPlace.SetActive(false);
             newobjectselected = false;
         }
     }
 }