DevDelete=<device-driver-name>
Deletes any line containing the specified filename from the CONFIG.SYS file.
This example DevDelete item in an Update Config.sys section deletes lines 1 and 3 but not line 2 of the example CONFIG.SYS file:
DevDelete=Foo.sys
;; lines in CONFIG.SYS
Device=Foo.sys ;; line #1
Install=foo.exe ;; line #2
Device=Foo.sys /d:b800 /I:3 ;; line #3