Remove warning about emails being lost (#487)

I don't think we should keep a long message in the file, since all the warnings are loaded on every page load, so it might have a negative effect on performance over a long period if we keep all warnings.

Feel free to merge on green.

Co-authored-by: shahanneda <shahan.neda@gmail.com>
Reviewed-on: #487
Reviewed-by: Amy <a258wang@csclub.uwaterloo.ca>
Co-authored-by: Shahan Neda <snedadah@csclub.uwaterloo.ca>
Co-committed-by: Shahan Neda <snedadah@csclub.uwaterloo.ca>

content/warnings/warnings.json

@@ -13,10 +13,5 @@
 		"startDate": "June 13 2022 00:00",
 		"endDate": "June 15 2022 22:00",
 		"message": "CSC machines will have their software updated and will momentarily go offline at 6pm EST on Wednesday, June 15, 2022"
-	},
-	{
-		"startDate": "Aug 1 2022 00:00",
-		"endDate": "Aug 8 2022 0:00",
-		"message": "Emails sent from any UWaterloo address to syscom@csclub.uwaterloo.ca and exec@csclub.uwaterloo.ca are currently being lost to the void. Syscom is currently investigating this issue. If you need to email us, either do it from an email address not ending in @uwaterloo.ca. or send it to one of the following emails: systems-committee@csclub.uwaterloo.ca, executive@csclub.uwaterloo.ca"
 	}
 ]