feat(plugins): a lot of work on #4298

pkg/plugins/datasource_plugin.go

@@ -4,12 +4,11 @@ import "encoding/json"
 
 type DataSourcePlugin struct {
 	FrontendPluginBase
-	DefaultMatchFormat string `json:"defaultMatchFormat"`
-	Annotations        bool   `json:"annotations"`
-	Metrics            bool   `json:"metrics"`
-	BuiltIn            bool   `json:"builtIn"`
-	Mixed              bool   `json:"mixed"`
-	App                string `json:"app"`
+	Annotations bool   `json:"annotations"`
+	Metrics     bool   `json:"metrics"`
+	BuiltIn     bool   `json:"builtIn"`
+	Mixed       bool   `json:"mixed"`
+	App         string `json:"app"`
 }
 
 func (p *DataSourcePlugin) Load(decoder *json.Decoder, pluginDir string) error {