Remove no-op tooltip icon definition

Button tooltip does not support icons, futher the linked code would fail with
a NoMethodError as `EmojiReactions.emoji` is not defined (note the plural definition)
which should be singular `EmojiReaction.emoji`

This was just forgotten, never gets executed.

app/components/work_packages/activities_tab/journals/item_component/reactions.html.erb

@@ -22,8 +22,7 @@
                     classes: "op-reactions-button"
                   )) do |button|
               button.with_tooltip(text: number_of_user_reactions_text(data[:users]),
-                                  test_selector: "reaction-tooltip-#{reaction}") do
-                button.with_icon(EmojiReactions.emoji(reaction), size: :small)
+                                  test_selector: "reaction-tooltip-#{reaction}")
               end
               "#{EmojiReaction.emoji(reaction)} #{data[:count]}"
             end