Replace c3 (#11112)

* [charts] replace in asset.js

* replace in reports

erpnext/crm/report/minutes_to_first_response_for_opportunity/minutes_to_first_response_for_opportunity.js

@@ -21,23 +21,13 @@ frappe.query_reports["Minutes to First Response for Opportunity"] = {
 	get_chart_data: function (columns, result) {
 		return {
 			data: {
-				x: 'Date',
-				columns: [
-					['Date'].concat($.map(result, function (d) { return d[0]; })),
-					['Mins to first response'].concat($.map(result, function (d) { return d[1]; }))
-				]
-				// rows: [['Date', 'Mins to first response']].concat(result)
+				labels: result.map(d => d[0]),
+				datasets: [{
+					title: 'Mins to first response',
+					values: result.map(d => d[1])
+				}]
 			},
-			axis: {
-				x: {
-					type: 'timeseries',
-					tick: {
-						format: frappe.ui.py_date_format
-					}
-				}
-			},
-			chart_type: 'line',
-
+			type: 'line',
 		}
 	}
 }