dspace.cfg: remove old webui.itemlist properties

These properties are no longer used in DSpace 7:

    webui.itemlist.widths
    webui.itemlist.*.widths
    webui.itemlist.tablewidth

dspace/config/dspace.cfg

@@ -1472,11 +1472,6 @@ log.report.dir = ${dspace.dir}/log
 #
 # webui.itemlist.columns = thumbnail, dc.date.issued(date), dc.title, dc.contributor.*
 #
-# You can customise the width of each column with the following line - you can have numbers (pixels)
-# or percentages. For the 'thumbnail' column, a setting of '*' will use the max width specified
-# for browse thumbnails (webui.browse.thumbnail.maxwidth, thumbnail.maxwidth)
-# webui.itemlist.widths = *, 130, 60%, 40%
-
 # Additionally, you can override the DC fields used on the listing page for
 # a given browse index and/or sort option. As a sort option or index may be defined
 # on a field that isn't normally included in the list, this allows you to display
@@ -1502,14 +1497,6 @@ log.report.dir = ${dspace.dir}/log
 # and thumbnails in the item list
 #
 # webui.itemlist.dateaccessioned.columns = thumbnail, dc.date.accessioned(date), dc.title, dc.contributor.*
-#
-# As above, you can customise the width of the columns for each configured column list, substituting '.widths' for
-# '.columns' in the property name. See the setting for webui.itemlist.widths for more details
-# webui.itemlist.dateaccessioned.widths = *, 130, 60%, 40%
-
-# You can also set the overall size of the item list table with the following setting. It can lead to faster
-# table rendering when used with the column widths above, but not generally recommended.
-# webui.itemlist.tablewidth = 100%
 
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