Remove some dead code (#6611)

We could remove a lot more than this, this is just a start.

There are various tools to help with this, knip is a good one

packages/twenty-front/src/modules/object-metadata/utils/getFieldRelationDirections.ts

@@ -1,38 +0,0 @@
-import { FieldMetadataItem } from '@/object-metadata/types/FieldMetadataItem';
-import { RelationDirections } from '@/object-record/record-field/types/FieldDefinition';
-import {
-  FieldMetadataType,
-  RelationDefinitionType,
-} from '~/generated-metadata/graphql';
-
-export const getFieldRelationDirections = (
-  field: Pick<FieldMetadataItem, 'type' | 'relationDefinition'> | undefined,
-): RelationDirections => {
-  if (!field || field.type !== FieldMetadataType.Relation) {
-    throw new Error(`Field is not a relation field.`);
-  }
-
-  switch (field.relationDefinition?.direction) {
-    case RelationDefinitionType.ManyToMany:
-      throw new Error(`Many to many relations are not supported.`);
-    case RelationDefinitionType.OneToMany:
-      return {
-        from: 'FROM_ONE_OBJECT',
-        to: 'TO_MANY_OBJECTS',
-      };
-    case RelationDefinitionType.ManyToOne:
-      return {
-        from: 'FROM_MANY_OBJECTS',
-        to: 'TO_ONE_OBJECT',
-      };
-    case RelationDefinitionType.OneToOne:
-      return {
-        from: 'FROM_ONE_OBJECT',
-        to: 'TO_ONE_OBJECT',
-      };
-    default:
-      throw new Error(
-        `Invalid relation definition type direction : ${field.relationDefinition?.direction}`,
-      );
-  }
-};