Delete the grand tour (journey/, 840MB) and its mix page

At Paul's direction: the July-3 csound-era grand-tour artifact — tracks, gapless journey.mp3/.mp4, and its journey/index.html mix page — is removed from the live site (the tree is the web root).

▶ Play it: Food Court Eternity → Smoke Arithmetic → Barometric Stampede — a constellation across three families — the path is the mix https://stellate.app/?genre=vaporwave&seed=9385&path=1679.4415,292.16891,1718.20526&xdur=0.046

064f649 https://github.com/aboard-io/stellate/commit/064f64917a3839ab1257c48b4f98bc217bab04a0