Remove lens_auto_date function

Author: Tim Roes

x-pack/plugins/lens/public/indexpattern_datasource/auto_date.test.ts

@@ -8,7 +8,6 @@ import { CoreSetup } from 'kibana/public';
 import { Storage } from '../../../../../src/plugins/kibana_utils/public';
 import { getIndexPatternDatasource } from './indexpattern';
 import { renameColumns } from './rename_columns';
-import { getAutoDate } from './auto_date';
 import { ExpressionsSetup } from '../../../../../src/plugins/expressions/public';
 import {
   DataPublicPluginSetup,
@@ -31,10 +30,9 @@ export class IndexPatternDatasource {
 
   setup(
     core: CoreSetup<IndexPatternDatasourceStartPlugins>,
-    { data: dataSetup, expressions, editorFrame }: IndexPatternDatasourceSetupPlugins
+    { expressions, editorFrame }: IndexPatternDatasourceSetupPlugins
   ) {
     expressions.registerFunction(renameColumns);
-    expressions.registerFunction(getAutoDate({ data: dataSetup }));
 
     editorFrame.registerDatasource(
       core.getStartServices().then(([coreStart, { data }]) =>

x-pack/plugins/lens/public/indexpattern_datasource/auto_date.ts

@@ -73,7 +73,7 @@ function getExpressionForLayer(
       .map(column =>
         column.operationType === dateHistogramOperation.type ? column.sourceField : null
       )
-      .filter(field => Boolean(field));
+      .filter((field): field is string => Boolean(field));
 
     return {
       type: 'expression',
@@ -87,20 +87,7 @@ function getExpressionForLayer(
             partialRows: [false],
             includeFormatHints: [true],
             timeField: allDateHistogramFields,
-            aggConfigs: [
-              {
-                type: 'expression',
-                chain: [
-                  {
-                    type: 'function',
-                    function: 'lens_auto_date',
-                    arguments: {
-                      aggConfigs: [JSON.stringify(aggs)],
-                    },
-                  },
-                ],
-              },
-            ],
+            aggConfigs: [JSON.stringify(aggs)],
           },
         },
         {