I would like to remove the Request user id field from SRM login screen. Can you please let me know how this can be achieved.
Besides modifying the html template, maybe OSS 778488 note can help you:
"If you now want to modify the login page, you have to modify method HTM_LOGIN in Transaction SE80 -> Class/Interface in the mentioned class CL_SRM_ICF_BASIC_LOGIN.
In this method, the login page for the internal ITS is constructed."