Discord is chrome-powered. Hit control/cmd + shift + i to open up the
chrome debugger tools. Hit Application tab. At the side, find the
Storage column, open up Local Storage, and click on the discord url.
These are all the stuff that Discord saves (including your password
token - do not share pls thx). There is a key named EmojiStore
if you clear the stuff to the right and reload discord with
ctrl/cmd+r, it will be cleared. Otherwise, if you know how to
manipulate JSON data types, you can litterally remove :frogface: from
the history.
Source: https://www.reddit.com/r/discordapp/comments/79icxx/location_of_file_for_frequently_used_emojis_please/dp33x49/
For the JSON, it'll look something like this:
{"100":{"totalUses":1,"recentUses":[1514823987052],"frecency":50,"score":50},"eggplant":{"totalUses":1,"recentUses":[1514823987052],"frecency":50,"score":50},"fork_and_knife":{"totalUses":1,"recentUses":[1514823987052],"frecency":50,"score":50},"yum":{"totalUses":1,"recentUses":[1514823987052],"frecency":50,"score":50},}
So to remove "eggplant", for example, you'll want to delete the text starting from "eggplant" to the curly brace and comma that comes after "score".
{"100":{"totalUses":1,"recentUses":[1514823987052],"frecency":50,"score":50},"eggplant":{"totalUses":1,"recentUses":[1514823987052],"frecency":50,"score":50},"fork_and_knife":{"totalUses":1,"recentUses":[1514823987052],"frecency":50,"score":50},"yum":{"totalUses":1,"recentUses":[1514823987052],"frecency":50,"score":50}}