fix(env): unset session override when vp env use called without arguments#960

fengmk2 merged 3 commits intovoidzero-dev:mainvoidzero-dev/vite-plus:mainfrom

JasonOA888:fix/env-use-unset-overrideJasonOA888/vite-plus:fix/env-use-unset-overrideCopy head branch name to clipboard