Dont return different types in virtual columns, delete not needed vir…

…tual columns

app/models/miq_template.rb

@@ -83,28 +83,8 @@ def display_platform
     end
   end
 
-  def display_cpu_cores
-    if respond_to?(:volume_template?) || respond_to?(:volume_snapshot_template?)
-      _("N/A")
-    else
-      cpu_total_cores
-    end
-  end
-
   def display_memory
-    if respond_to?(:volume_template?) || respond_to?(:volume_snapshot_template?)
-      _("N/A")
-    else
-      mem_cpu.to_i * 1024 * 1024
-    end
-  end
-
-  def display_snapshots
-    if respond_to?(:volume_template?) || respond_to?(:volume_snapshot_template?)
-      _("N/A")
-    else
-      v_total_snapshots
-    end
+    mem_cpu.to_i * 1024 * 1024
   end
 
   def display_tenant