removed stale, unused latex sources

documentation/design-documentation/.gitkeep

documentation/design-documentation/Dockerfile.local

documentation/design-documentation/Dockerfile.travis

documentation/design-documentation/LICENSE

documentation/design-documentation/Makefile

documentation/design-documentation/README.md

documentation/design-documentation/chapters/.DS_Store

...ion/design-documentation/chapters/examples/appendix01.tex

...ion/design-documentation/chapters/examples/appendix02.tex

...tion/design-documentation/chapters/examples/chapter01.tex

...tion/design-documentation/chapters/examples/chapter02.tex

...tion/design-documentation/chapters/examples/chapter03.tex

...on/design-documentation/chapters/recommendations/Makefile

...esign-documentation/chapters/recommendations/abstract.tex

...ign-documentation/chapters/recommendations/checklists.tex

...sign-documentation/chapters/recommendations/citations.tex

...esign-documentation/chapters/recommendations/graphics.tex

...n-documentation/chapters/recommendations/introduction.tex

...esign-documentation/chapters/recommendations/language.tex

...esign-documentation/chapters/recommendations/packages.tex