沙盒API pm.environment.unset（variableName）也允许这样做。

Sandbox API pm.environment.unset(variableName) also allows to do that.

以防您要清除所有环境变量一次-您可能要执行以下操作： pm.environment.clear（）。

In case is you want to clear all environment variables at once - you might want to do: pm.environment.clear().

这将清除所有环境值。

参考： https://learning.postman.com/docs/postman/scripts/postman-sandbox-api-reference/#pmenvironment