Remove Sarah from tech report template (#1114)

Author: tunetheweb

.github/ISSUE_TEMPLATE/tech-report.md

@@ -3,7 +3,6 @@ name: Tech Report
 about: Raise an issue or feature request related to the HTTP Archive Tech Report
 title: 'Tech Report: '
 labels: Tech Report
-assignees: tunetheweb, sarahfossheim
 
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