Remove duplicate "Max Diff Lines" from config view (#3001)

Signed-off-by: Duncan Ogilvie <mr.exodia.tpodt@gmail.com>

templates/admin/config.tmpl

@@ -264,8 +264,6 @@
 				<dd>{{.Git.MaxGitDiffFiles}}</dd>
 				<dt>{{.i18n.Tr "admin.config.git_gc_args"}}</dt>
 				<dd><code>{{.Git.GCArgs}}</code></dd>
-				<dt>{{.i18n.Tr "admin.config.git_max_diff_lines"}}</dt>
-				<dd>{{.Git.MaxGitDiffLines}}</dd>
 				<div class="ui divider"></div>
 				<dt>{{.i18n.Tr "admin.config.git_migrate_timeout"}}</dt>
 				<dd>{{.Git.Timeout.Migrate}} {{.i18n.Tr "tool.raw_seconds"}}</dd>