How to delete parameter but can process in work area

Helo,
Im a beginner on SAP , i wanna ask how to delete this parameter and keep process data.

should me to create a new variabel or other ??

SELECTION-SCREEN BEGIN OF BLOCK rpt WITH FRAME TITLE TEXT-005. "
PARAMETERS: dsum AS CHECKBOX DEFAULT 'X',
ddetail AS CHECKBOX.

PARAMETERS: dvaltype RADIOBUTTON GROUP rpt DEFAULT 'X' USER-COMMAND ucomm.
PARAMETERS: dplant RADIOBUTTON GROUP rpt.

SELECTION-SCREEN BEGIN OF BLOCK plt WITH FRAME TITLE TEXT-006.
SELECT-OPTIONS gwerks FOR zac_cst_move-werks MODIF ID plt.
SELECTION-SCREEN END OF BLOCK plt.
PARAMETERS: dplval RADIOBUTTON GROUP rpt.

SELECTION-SCREEN BEGIN OF BLOCK vlt WITH FRAME TITLE TEXT-007.
SELECT-OPTIONS vwerks FOR zac_cst_move-werks MODIF ID plv.
SELECT-OPTIONS vbwtar FOR zac_cst_move-bwtar MODIF ID plv.
SELECTION-SCREEN END OF BLOCK vlt.