remove min time interval from datasource config

public/app/plugins/datasource/postgres/partials/config.html

@@ -38,18 +38,6 @@
 	</div>
 </div>
 
-<div class="gf-form-group">
-	<div class="gf-form-inline">
-		<div class="gf-form">
-			<span class="gf-form-label">Min time interval</span>
-			<input type="text" class="gf-form-input width-6" ng-model="ctrl.current.jsonData.timeInterval" spellcheck='false' placeholder="10s"></input>
-			<info-popover mode="right-absolute">
-				A lower limit for the auto group by time interval. Recommended to be set to write frequency,
-				for example <code>1m</code> if your data is written every minute.
-			</info-popover>
-		</div>
-	</div>
-</div>
 <h3 class="page-heading">PostgreSQL details</h3>
 
 <div class="gf-form-group">