Support @Omitted entry type

tools/latex.sh

@@ -18,6 +18,7 @@ cmd_reformat_bib() {
         bibtool -- 'print.align = 24' -- 'print.align.key = 0' \
             -- 'print.equal.right = off' -- 'pass.comments = on' \
             -- 'print.line.length = 1000' -- 'print.use.tab = off' \
+            -- 'new.entry.type {Omitted}' \
             -- 'rewrite.rule = {doi# "https?://.*doi.*\.org/\(10\.[0-9]+/.+\)"# "\1"}' \
             "$f" | sed '/./,$!d' | sponge "$f"
     done