Hi,
Those buttons are not part of the view but ALV's. So you have to hide the ALV toolbar buttons using if_salv_wd_std_functions.
write the below code:
data lr_interfacecontroller type ref to iwci_salv_wd_table .
data lr_value type ref to cl_salv_wd_config_table.
lr_interfacecontroller = wd_this->wd_cpifc_alv_comp( ).
lr_value = lr_interfacecontroller->get_model( ).
lr_value->if_salv_wd_std_functions~set_pdf_allowed( value = abap_false ).
You can refer this thread: Removing "print version" button in alv
Regards,
Kiran