Delete all java sources

src/main/java/leon/codegen/runtime/ArrayBox.java

src/main/java/leon/codegen/runtime/Bag.java

src/main/java/leon/codegen/runtime/BigInt.java

src/main/java/leon/codegen/runtime/CaseClass.java

src/main/java/leon/codegen/runtime/FiniteLambda.java

src/main/java/leon/codegen/runtime/Lambda.java

.../leon/codegen/runtime/LeonCodeGenEvaluationException.java

...ava/leon/codegen/runtime/LeonCodeGenRuntimeException.java

.../java/leon/codegen/runtime/LeonCodeGenRuntimeHashing.java

.../java/leon/codegen/runtime/LeonCodeGenRuntimeMonitor.java

src/main/java/leon/codegen/runtime/Map.java

src/main/java/leon/codegen/runtime/Rational.java

src/main/java/leon/codegen/runtime/Real.java

src/main/java/leon/codegen/runtime/Set.java

src/main/java/leon/codegen/runtime/StrOps.java

src/main/java/leon/codegen/runtime/Tuple.java