#332 - Remove @DaTa annotation from jpa classes

- change hashcode method in Context class
- remove unused imports

src/main/java/de/numcodex/feasibility_gui_backend/terminology/persistence/Context.java

@@ -44,7 +44,7 @@ public final boolean equals(Object o) {
     }
 
     @Override
-    public final int hashCode() {
-        return this instanceof HibernateProxy ? ((HibernateProxy) this).getHibernateLazyInitializer().getPersistentClass().hashCode() : getClass().hashCode();
+    public int hashCode() {
+        return Objects.hash(id, system, code, version, display);
     }
 }

src/test/java/de/numcodex/feasibility_gui_backend/terminology/es/CodeableConceptServiceIT.java

@@ -17,7 +17,6 @@
 import org.testcontainers.junit.jupiter.Container;
 import org.testcontainers.junit.jupiter.Testcontainers;
 
-import java.io.IOException;
 import java.util.List;
 
 import static org.assertj.core.api.Assertions.assertThat;

src/test/java/de/numcodex/feasibility_gui_backend/terminology/persistence/UiProfileContentTest.java

@@ -1,8 +1,6 @@
 package de.numcodex.feasibility_gui_backend.terminology.persistence;
 
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.params.ParameterizedTest;
-import org.junit.jupiter.params.provider.CsvSource;
 
 import static org.junit.jupiter.api.Assertions.*;