DashboardScene: Do not hide variables on save (#81501)

public/app/features/dashboard-scene/serialization/__snapshots__/transformSceneToSaveModel.test.ts.snap

@@ -494,7 +494,6 @@ exports[`transformSceneToSaveModel Given a simple scene with custom settings Sho
           "text": "1m",
           "value": "1m",
         },
-        "hide": 2,
         "name": "intervalVar",
         "query": "1m,10m,30m,1h,6h,12h,1d,7d,14d,30d",
         "refresh": 2,
@@ -812,7 +811,6 @@ exports[`transformSceneToSaveModel Given a simple scene with variables Should tr
           "text": "1m",
           "value": "1m",
         },
-        "hide": 2,
         "name": "intervalVar",
         "query": "1m,10m,30m,1h,6h,12h,1d,7d,14d,30d",
         "refresh": 2,

public/app/features/dashboard-scene/serialization/sceneVariablesSetToVariables.test.ts

@@ -336,7 +336,6 @@ describe('sceneVariablesSetToVariables', () => {
         "value": "text value",
       },
       "description": "test-desc",
-      "hide": 2,
       "label": "test-label",
       "name": "test",
       "query": "text value",

public/app/features/dashboard-scene/serialization/sceneVariablesSetToVariables.ts

@@ -34,7 +34,6 @@ export function sceneVariablesSetToVariables(set: SceneVariables) {
         includeAll: variable.state.includeAll,
         multi: variable.state.isMulti,
         skipUrlSync: variable.state.skipUrlSync,
-        hide: variable.state.hide || VariableHide.dontHide,
       });
     } else if (sceneUtils.isCustomVariable(variable)) {
       variables.push({
@@ -90,7 +89,6 @@ export function sceneVariablesSetToVariables(set: SceneVariables) {
           value: variable.state.value,
         },
         query: intervals,
-        hide: VariableHide.hideVariable,
         refresh: variable.state.refresh,
         // @ts-expect-error ?? how to fix this without adding the ts-expect-error
         auto: variable.state.autoEnabled,
@@ -105,7 +103,6 @@ export function sceneVariablesSetToVariables(set: SceneVariables) {
           value: variable.state.value,
         },
         query: variable.state.value,
-        hide: VariableHide.hideVariable,
       });
     } else {
       throw new Error('Unsupported variable type');