removed lex and tools directories.

generator/tools/.depend

generator/tools/.ignore

generator/tools/Makefile

generator/tools/Makefile.nt

generator/tools/Makefile.shared

generator/tools/addlabels.ml

generator/tools/check-typo

generator/tools/checkstack.c

generator/tools/ci-build

generator/tools/cleanup-header

generator/tools/cmt2annot.ml

generator/tools/cvt_emit.mll

generator/tools/depend.ml

generator/tools/depend.mli

generator/tools/dumpobj.ml

generator/tools/eqparsetree.ml

generator/tools/lexer299.mll

generator/tools/lexer301.mll

generator/tools/magic

generator/tools/make-opcodes