chore(pack): drop Aeronautics Iris Fix

It is distributed via CurseForge metadata only, which packwiz cannot
fetch automatically and forces a manual download. Remove it so the pack
stays fully automatic; Iris Veil Compat retains the Create Aeronautics
visual fix for Veil under shaders.

mods/aeronautics-iris-fix.pw.toml

@@ -1,13 +0,0 @@
-name = "Aeronautics Iris Fix"
-filename = "aero-shadow-fix-2.1.0.jar"
-side = "client"
-
-[download]
-hash-format = "sha1"
-hash = "47f48363d9805b9b60fb9a3cf1bb447bb80ad538"
-mode = "metadata:curseforge"
-
-[update]
-[update.curseforge]
-file-id = 8589529
-project-id = 1641969