MM-10790: Fix Slack Import logs that got broken in refactoring. (#8938)

i18n/en.json

@@ -2274,22 +2274,6 @@
     "id": "api.slackimport.slack_parse_posts.error",
     "translation": "Slack Import: Error occurred when parsing some Slack posts. Import may work anyway."
   },
-  {
-    "id": "api.slackimport.slack_sanitise_channel_properties.display_name_too_long.warn",
-    "translation": "Slack Import: Channel {{.ChannelName}} display name exceeds the maximum length. It will be truncated when imported."
-  },
-  {
-    "id": "api.slackimport.slack_sanitise_channel_properties.header_too_long.warn",
-    "translation": "Slack Import: Channel {{.ChannelName}} header exceeds the maximum length. It will be truncated when imported."
-  },
-  {
-    "id": "api.slackimport.slack_sanitise_channel_properties.name_too_long.warn",
-    "translation": "Slack Import: Channel {{.ChannelName}} handle exceeds the maximum length. It will be truncated when imported."
-  },
-  {
-    "id": "api.slackimport.slack_sanitise_channel_properties.purpose_too_long.warn",
-    "translation": "Slack Import: Channel {{.ChannelName}} purpose exceeds the maximum length. It will be truncated when imported."
-  },
   {
     "id": "api.status.init.debug",
     "translation": "Initializing status API routes"