Remove old translations

www/common/translations/messages.json

@@ -608,11 +608,6 @@
     "about_intro": "CryptPad is created inside of the Research Team at <a href=\"http://xwiki.com\">XWiki SAS</a>, a small business located in Paris France and Iasi Romania. There are 3 core team members working on CryptPad plus a number of contributors both inside and outside of XWiki SAS.",
     "about_core": "Core Developers",
     "about_contributors": "Key Contributors",
-    "main_about_p22": "Tweet us",
-    "main_about_p23": "open an issue on GitHub",
-    "main_about_p24": "say Hello (Matrix)",
-    "main_about_p25": "send us an email",
-    "main_about_p26": "If you have any questions or comments, feel free to reach out!",
     "main_info": "<h2>Collaborate in Confidence</h2> Grow your ideas together with shared documents while <strong>Zero Knowledge</strong> technology secures your privacy; <strong>even from us</strong>.",
     "main_catch_phrase": "The Zero Knowledge Cloud",
     "main_footerText": "With CryptPad, you can make quick collaborative documents for taking notes and writing down ideas together.",