删除现有的环境变量。
object.Remove(strName)
Remove 方法从 PROCESS、USER、SYSTEM 和 VOLATILE 四种类型的环境中删除环境变量。用 Remove 方法删除的环境变量不会被永久删除；它们只是从当前的会话中删除。
下面的代码删除 Process 环境变量 TestVar。
Dim WshShell, WshEnv
Set WshShell = WScript.CreateObject("WScript.Shell")
Set WshEnv = WshShell.Environment("PROCESS")
WshEnv("TestVar") = "Windows Script Host"
WScript.Echo WshShell.ExpandEnvironmentStrings("The value of the test variable is: '%TestVar%'")
WshEnv.Remove "TestVar"
WScript.Echo WshShell.ExpandEnvironmentStrings("The value of the test variable is: '%TestVar%'")
var WshShell = WScript.CreateObject("WScript.Shell");
var WshEnv = WshShell.Environment("PROCESS");
WshEnv("TestVar") = "Windows Script Host";
WScript.Echo(WshShell.ExpandEnvironmentStrings("The value of the test variable is: '%TestVar%'"));
WshEnv.Remove("TestVar");
WScript.Echo(WshShell.ExpandEnvironmentStrings("The value of the test variable is: '%TestVar%'"));