remove relast preprocessor

preprocessor/.gitignore

preprocessor/LICENSE.txt

preprocessor/README.md

preprocessor/build.xml

preprocessor/examples/.gitignore

preprocessor/examples/All.relast

preprocessor/examples/TrainBenchmark.relast

preprocessor/examples/TrainBenchmarkGen.ast

preprocessor/examples/TrainBenchmarkGen.jadd

preprocessor/relast-compiler.jar

preprocessor/spec/jastadd/Analysis.jrag

preprocessor/spec/jastadd/Backend.jadd

preprocessor/spec/jastadd/DumpTree.jrag

preprocessor/spec/jastadd/Errors.jrag

preprocessor/spec/jastadd/RelAst.ast

preprocessor/spec/parser/Preamble.parser

preprocessor/spec/parser/RelAstBase.parser

preprocessor/spec/scanner/RelAst.flex

...cessor/src/java/org/jastadd/relast/compiler/Compiler.java

preprocessor/src/java/org/jastadd/relast/compiler/Utils.java