Gauges: Fixes error when mappings array was undefined (#18353)

public/app/plugins/panel/gauge/types.ts

@@ -9,10 +9,6 @@ export interface GaugeOptions extends SingleStatBaseOptions {
 
 export const standardGaugeFieldOptions: FieldDisplayOptions = {
   ...standardFieldDisplayOptions,
-  defaults: {
-    min: 0,
-    max: 100,
-  },
 };
 
 export const defaults: GaugeOptions = {

public/app/plugins/panel/singlestat2/types.ts

@@ -13,12 +13,10 @@ export interface SingleStatOptions extends SingleStatBaseOptions {
   prefixFontSize?: string;
   valueFontSize?: string;
   postfixFontSize?: string;
-
   colorBackground?: boolean;
   colorValue?: boolean;
   colorPrefix?: boolean;
   colorPostfix?: boolean;
-
   sparkline: SparklineOptions;
 }
 
@@ -32,6 +30,7 @@ export const standardFieldDisplayOptions: FieldDisplayOptions = {
       { value: -Infinity, color: 'green' },
       { value: 80, color: 'red' }, // 80%
     ],
+    mappings: [],
   },
   override: {},
 };