remove rating for sortable fields in client and server (#599)

Author: MoSchmidt

src/main/java/de/tum/cit/aet/evaluation/service/ApplicationEvaluationService.java

@@ -48,7 +48,7 @@ public class ApplicationEvaluationService {
 
     private static final Set<ApplicationState> REVIEW_STATES = Set.of(ApplicationState.SENT, ApplicationState.IN_REVIEW);
 
-    private static final Set<String> SORTABLE_FIELDS = Set.of("rating", "createdAt", "applicant.lastName");
+    private static final Set<String> SORTABLE_FIELDS = Set.of("createdAt", "applicant.lastName");
 
     /**
      * Accepts the specified application and updates its state.

src/main/webapp/app/evaluation/filterSortOptions.ts

@@ -18,16 +18,6 @@ export const filterFields: FilterField[] = [
 ];
 
 export const sortOptions: SortOption[] = [
-  {
-    displayName: 'Rating (Worst to Best)',
-    field: 'rating',
-    direction: 'ASC',
-  },
-  {
-    displayName: 'Rating (Best to Worst)',
-    field: 'rating',
-    direction: 'DESC',
-  },
   {
     displayName: 'Applied at (Oldest to Newest)',
     field: 'createdAt',