Remove unused modules.

eraser.rest/.gitignore

eraser.rest/build.gradle

...c/main/java/de/tudresden/inf/st/eraser/rest/Activity.java

...a/de/tudresden/inf/st/eraser/rest/ActivityController.java

...ain/java/de/tudresden/inf/st/eraser/rest/Application.java

...ain/java/de/tudresden/inf/st/eraser/rest/ChangedItem.java

.../src/main/java/de/tudresden/inf/st/eraser/rest/Event.java

...java/de/tudresden/inf/st/eraser/rest/EventController.java

...va/de/tudresden/inf/st/eraser/rest/ManualChangeEvent.java

...ava/de/tudresden/inf/st/eraser/rest/RecognitionEvent.java

...n/java/de/tudresden/inf/st/eraser/rest/SwaggerConfig.java

eraser.rest/src/main/resources/log4j2.xml

influx_test/.gitignore

influx_test/build.gradle

...ain/java/de/tudresden/inf/st/eraser/influx_test/Main.java

influx_test/src/main/resources/log4j2.xml

learner_test/.gitignore

learner_test/build.gradle

...in/java/de/tudresden/inf/st/eraser/learner_test/Main.java

...va/de/tudresden/inf/st/eraser/learner_test/final_data.csv