Fix: remove duplicated signed commit icons (#8820)

Signed-off-by: Wenxuan Zhao <viz@linux.com>

templates/repo/commits_list.tmpl

@@ -42,7 +42,6 @@
 								{{if .Signature}}
 									<div class="ui detail icon button">
 										{{if .Verification.Verified}}
-											<i title="{{.Verification.Reason}}" class="lock green icon"></i>
 											{{if ne .Verification.SigningUser.ID 0}}
 												<i title="{{.Verification.Reason}}" class="lock green icon"></i>
 											{{else}}