Clean old deps mechanism

INSTALL.md

scripts/linux-dep-helpers/linux-install-test-data.pl

scripts/linux-dep-helpers/linux-preinstall-python-repo.pl

scripts/linux-dependencies-fedora.txt

scripts/linux-dependencies-ubuntu1404.txt

scripts/linux-dependencies-ubuntu16_plus.txt

scripts/linux-install_dependencies.pl

scripts/tests-data.txt

scripts/unix-ctest-launcher.sh-base

scripts/unix-get-dependencies.sh

scripts/windows-build-tools.txt

scripts/windows-ctest-launcher.cmd-base

scripts/windows-dependencies-x64.txt

scripts/windows-dependencies-x86.txt

scripts/windows-generate-vs-project.cmd

scripts/windows-get-dependencies.ps1

scripts/windows-install-dependencies-all-x64.cmd

scripts/windows-install-dependencies-all.cmd

scripts/windows-launch-visual-studio-debug.cmd

scripts/windows-launch-visual-studio.cmd