utils: remove obsolete knot1to2 utility

.gitignore

Knot.files

doc/Makefile.am

doc/conf.py

doc/man/knot1to2.1in

doc/man_knot1to2.rst

doc/utilities.rst

scripts/update-parser.sh

src/Makefile.am

src/utils/knot1to2/cf-lex.c

src/utils/knot1to2/cf-lex.l

src/utils/knot1to2/cf-parse.tab.c

src/utils/knot1to2/cf-parse.tab.h

src/utils/knot1to2/cf-parse.y

src/utils/knot1to2/extra.c

src/utils/knot1to2/extra.h

src/utils/knot1to2/includes.c

src/utils/knot1to2/includes.h

src/utils/knot1to2/main.c

src/utils/knot1to2/scheme.h