prune i18n and get rid of /help header

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/SlashCommands.js

@@ -819,13 +819,6 @@ export const CommandMap = {
             Modal.createTrackedDialog('Slash Commands', 'Help', InfoDialog, {
                 title: _t("Command Help"),
                 description: <table>
-                    <thead>
-                        <tr>
-                            <td>{_t("Command")}</td>
-                            <td>{_t("Arguments")}</td>
-                            <td>{_t("Description")}</td>
-                        </tr>
-                    </thead>
                     <tbody>
                     {
                         Object.values(CommandMap).map(cmd => {

src/i18n/strings/en_EN.json

@@ -182,11 +182,6 @@
     "Forces the current outbound group session in an encrypted room to be discarded": "Forces the current outbound group session in an encrypted room to be discarded",
     "Sends the given message coloured as a rainbow": "Sends the given message coloured as a rainbow",
     "Sends the given emote coloured as a rainbow": "Sends the given emote coloured as a rainbow",
-    "Displays list of commands with usages and descriptions": "Displays list of commands with usages and descriptions",
-    "Command Help": "Command Help",
-    "Command": "Command",
-    "Arguments": "Arguments",
-    "Description": "Description",
     "Unrecognised command:": "Unrecognised command:",
     "Reason": "Reason",
     "%(targetName)s accepted the invitation for %(displayName)s.": "%(targetName)s accepted the invitation for %(displayName)s.",
@@ -1471,6 +1466,7 @@
     "Your community hasn't got a Long Description, a HTML page to show to community members.<br />Click here to open settings and give it one!": "Your community hasn't got a Long Description, a HTML page to show to community members.<br />Click here to open settings and give it one!",
     "Long Description (HTML)": "Long Description (HTML)",
     "Upload avatar": "Upload avatar",
+    "Description": "Description",
     "Community %(groupId)s not found": "Community %(groupId)s not found",
     "This homeserver does not support communities": "This homeserver does not support communities",
     "Failed to load %(groupId)s": "Failed to load %(groupId)s",