Migrate to calculate.env

install/variables/system.py

@@ -365,15 +365,7 @@ class VariableOsInstallDevFrom(Variable):
     """
     Root device of previous installed os
     """
-    def get(self):
-        """Get from calculate2.env by default"""
-        try:
-            config = cl_template.iniParser('/etc/calculate/calculate2.env')
-            val = config.getVar('install','os_install_dev_from')
-            return val.encode('utf-8')
-        except:
-            pass
-        return ""
+    value = ""
 
     def set(self,value):
         """