chore: Delete now unused import pages/routes/controllers and utils

Although a lot of work has been put into multiple iterations of these,
this import-specific stuff is now no longer needed (and partly broken).
All of the deleted features (and even more) have been integrated into
the regular entity routes and display pages.

Author: kellnerd

src/client/components/pages/entities/author.js

@@ -43,7 +43,7 @@ const {deletedEntityMessage, extractAttribute, getTypeAttribute, getEntityUrl,
 	ENTITY_TYPE_ICONS, getSortNameOfDefaultAlias, transformISODateForDisplay} = entityHelper;
 const {Button, Col, Row} = bootstrap;
 
-export function AuthorAttributes({author}) {
+function AuthorAttributes({author}) {
 	if (author.deleted) {
 		return deletedEntityMessage;
 	}

src/client/components/pages/entities/edition-group.js

@@ -39,7 +39,7 @@ import WikipediaExtract from './wikipedia-extract';
 const {deletedEntityMessage, getTypeAttribute, getEntityUrl, ENTITY_TYPE_ICONS, getSortNameOfDefaultAlias} = entityHelper;
 const {Col, Row} = bootstrap;
 
-export function EditionGroupAttributes({editionGroup}) {
+function EditionGroupAttributes({editionGroup}) {
 	if (editionGroup.deleted) {
 		return deletedEntityMessage;
 	}

src/client/components/pages/entities/edition.js

@@ -40,7 +40,7 @@ const {
 } = entityHelper;
 const {Col, Row} = bootstrap;
 
-export function EditionAttributes({edition}) {
+function EditionAttributes({edition}) {
 	if (edition.deleted) {
 		return deletedEntityMessage;
 	}

src/client/components/pages/entities/publisher.js

@@ -35,7 +35,7 @@ const {deletedEntityMessage, extractAttribute, getTypeAttribute, getEntityUrl,
 	ENTITY_TYPE_ICONS, getSortNameOfDefaultAlias, transformISODateForDisplay} = entityHelper;
 const {Col, Row} = bootstrap;
 
-export function PublisherAttributes({publisher}) {
+function PublisherAttributes({publisher}) {
 	if (publisher.deleted) {
 		return deletedEntityMessage;
 	}

src/client/components/pages/entities/series.js

@@ -37,7 +37,7 @@ import WikipediaExtract from './wikipedia-extract';
 const {deletedEntityMessage, getEntityUrl, ENTITY_TYPE_ICONS, getSortNameOfDefaultAlias} = entityHelper;
 const {Col, Row} = bootstrap;
 
-export function SeriesAttributes({series}) {
+function SeriesAttributes({series}) {
 	if (series.deleted) {
 		return deletedEntityMessage;
 	}

src/client/components/pages/entities/work.js

@@ -40,7 +40,7 @@ const {deletedEntityMessage, getRelationshipSourceByTypeId, getLanguageAttribute
 const {Col, Row} = bootstrap;
 
 
-export function WorkAttributes({work}) {
+function WorkAttributes({work}) {
 	if (work.deleted) {
 		return deletedEntityMessage;
 	}