Remove obsolet config property "students-own-questions"

src/main/java/de/thm/arsnova/controller/ConfigurationController.java

@@ -82,9 +82,6 @@ public class ConfigurationController extends AbstractController {
 	@Value("${features.mathjax.src:}")
 	private String mathJaxSrc;
 
-	@Value("${features.students-own-questions.enabled:false}")
-	private String studentsOwnQuestions;
-
 	@Value("${features.freetext-imageanswer.enabled:false}")
 	private String imageAnswerEnabled;
 
@@ -223,7 +220,6 @@ public class ConfigurationController extends AbstractController {
 		features.put("mathJax", "true".equals(mathJaxEnabled));
 		/* Keep the markdown property for now since the frontend still depends on it */
 		features.put("markdown", true);
-		features.put("studentsOwnQuestions", "true".equals(studentsOwnQuestions));
 		features.put("imageAnswer", "true".equals(imageAnswerEnabled));
 		features.put("gridSquare", "true".equals(gridSquareEnabled));
 		features.put("sessionImportExport", "true".equals(sessionImportExportEnabled));

src/main/resources/arsnova.properties.example

@@ -181,7 +181,6 @@ features.mathjax.src=//cdn.mathjax.org/mathjax/2.4-latest/MathJax.js
 # tested in a production environment over a longer time frame and/or their
 # behavior will change in future releases.
 #
-features.students-own-questions.enabled=true
 features.freetext-imageanswer.enabled=true
 features.question-format.grid-square.enabled=true
 

src/test/resources/arsnova.properties.example

@@ -181,7 +181,6 @@ features.mathjax.src=//cdn.mathjax.org/mathjax/2.4-latest/MathJax.js
 # tested in a production environment over a longer time frame and/or their
 # behavior will change in future releases.
 #
-features.students-own-questions.enabled=true
 features.freetext-imageanswer.enabled=true
 features.question-format.grid-square.enabled=true