removed unused modules

.gitmodules

pracr-python

pracr-scheme

racr-cpp

trainbenchmark-format-graph-neo4j/build.gradle

.../java/hu/bme/mit/trainbenchmark/neo4j/Neo4jConstants.java

...ain/java/hu/bme/mit/trainbenchmark/neo4j/Neo4jHelper.java

...java/hu/bme/mit/trainbenchmark/neo4j/apoc/ApocHelper.java

...bme/mit/trainbenchmark/neo4j/config/Neo4jGraphFormat.java

trainbenchmark-format-rdf/README.md

trainbenchmark-format-rdf/build.gradle

...main/java/hu/bme/mit/trainbenchmark/rdf/RdfConstants.java

...rc/main/java/hu/bme/mit/trainbenchmark/rdf/RdfFormat.java

...rc/main/java/hu/bme/mit/trainbenchmark/rdf/RdfHelper.java

...rmat-rdf/src/main/resources/metamodel/railway-inferred.nt

...mat-rdf/src/main/resources/metamodel/railway-inferred.ttl

...at-rdf/src/main/resources/metamodel/railway-metamodel.ttl

trainbenchmark-format-sql/build.gradle

trainbenchmark-format-sql/scripts/README.md

trainbenchmark-format-sql/scripts/clean-mysql.sh