If you want to hide the label, but not hide the table cell and use both columns for the body of the field (the second table cell) you can use this in Field CSS:
td.ms-formlabel *{display:none;}
If you however want to entirely hide the first cell in this row you can use this in Custom JS:
jQuery("#dffs_Title td.ms-formlabel").hide().next().prop("colspan","2");
Replace “Title” with your field internal name.
Alexander