remove direction from messages (#20026)

This was a leftover column removed in
https://github.com/twentyhq/twenty/pull/6743 but was accidentally added
again when we migrated to `buildMessageStandardFlatFieldMetadatas` from
workspace decorator

/closes #20011

packages/twenty-server/src/engine/workspace-manager/twenty-standard-application/utils/field-metadata/compute-message-standard-flat-field-metadata.util.ts

@@ -212,40 +212,6 @@ export const buildMessageStandardFlatFieldMetadatas = ({
     twentyStandardApplicationId,
     now,
   }),
-  direction: createStandardFieldFlatMetadata({
-    objectName,
-    workspaceId,
-    context: {
-      fieldName: 'direction',
-      type: FieldMetadataType.SELECT,
-      label: i18nLabel(msg`Direction`),
-      description: i18nLabel(msg`Message Direction`),
-      icon: 'IconDirection',
-      isNullable: false,
-      isUIReadOnly: true,
-      defaultValue: "'INCOMING'",
-      options: [
-        {
-          id: '20202020-7b52-47d2-abd8-e96a4295f9a6',
-          value: 'INCOMING',
-          label: i18nLabel(msg`Incoming`),
-          position: 0,
-          color: 'green',
-        },
-        {
-          id: '20202020-11cb-42be-8df7-709ad53f90f9',
-          value: 'OUTGOING',
-          label: i18nLabel(msg`Outgoing`),
-          position: 1,
-          color: 'blue',
-        },
-      ],
-    },
-    standardObjectMetadataRelatedEntityIds,
-    dependencyFlatEntityMaps,
-    twentyStandardApplicationId,
-    now,
-  }),
   subject: createStandardFieldFlatMetadata({
     objectName,
     workspaceId,