- remove interfaces no longer used

...ource/java/ch/systemsx/cisd/bds/ExperimentIdentifier.java

bds/source/java/ch/systemsx/cisd/bds/IDataStructure.java

bds/source/java/ch/systemsx/cisd/bds/IDataStructureV1_0.java

bds/source/java/ch/systemsx/cisd/bds/IDirectory.java

bds/source/java/ch/systemsx/cisd/bds/IFile.java

bds/source/java/ch/systemsx/cisd/bds/ILink.java

bds/source/java/ch/systemsx/cisd/bds/INode.java

bds/source/java/ch/systemsx/cisd/bds/IStorage.java

bds/source/java/ch/systemsx/cisd/bds/ProcessingType.java

bds/source/java/ch/systemsx/cisd/bds/Version.java

bds/source/java/ch/systemsx/cisd/bds/storage/IDirectory.java

...va/ch/systemsx/cisd/bds/storage/filesystem/Directory.java