Revert "DataLinks: Encode variable params for data link URLs (#46100)" (#47763)

This reverts commit b47f5433d7.

devenv/dev-dashboards/feature-templating/templating-dashboard-links-and-variables.json

@@ -16,7 +16,7 @@
   "gnetId": null,
   "graphTooltip": 0,
   "id": null,
-  "iteration": 1646409057541,
+  "iteration": 1601526910610,
   "links": [
     {
       "icon": "external link",
@@ -73,61 +73,6 @@
       "timeShift": null,
       "title": "${custom.text}",
       "type": "text"
-    },
-    {
-      "id": 4,
-      "gridPos": {
-        "h": 9,
-        "w": 9,
-        "x": 12,
-        "y": 0
-      },
-      "type": "stat",
-      "title": "Panel Title",
-      "fieldConfig": {
-        "defaults": {
-          "mappings": [],
-          "thresholds": {
-            "mode": "absolute",
-            "steps": [
-              {
-                "color": "green",
-                "value": null
-              },
-              {
-                "color": "red",
-                "value": 80
-              }
-            ]
-          },
-          "color": {
-            "mode": "thresholds"
-          },
-          "links": [
-            {
-              "title": "Var Link",
-              "url": "/d/vmie2cmWz/bar-gauge-demo?var-custom=$custom"
-            }
-          ]
-        },
-        "overrides": []
-      },
-      "options": {
-        "reduceOptions": {
-          "values": false,
-          "calcs": [
-            "lastNotNull"
-          ],
-          "fields": ""
-        },
-        "orientation": "auto",
-        "textMode": "auto",
-        "colorMode": "value",
-        "graphMode": "area",
-        "justifyMode": "auto"
-      },
-      "pluginVersion": "8.5.0-pre",
-      "datasource": null
     }
   ],
   "schemaVersion": 26,
@@ -167,11 +112,6 @@
             "selected": false,
             "text": "p3",
             "value": "p3"
-          },
-          {
-            "selected": false,
-            "text": "p4",
-            "value": "test%25value"
           }
         ],
         "query": "p1,p2,p3",