Delete ZAPDTR and OTRExporter

Nothing drives them any more: ExtractAssets runs soh-torch, the in-game
extractor calls Companion directly, GenerateSohOtr copies a prebuilt
archive, and soh links torch instead of ZAPDLib. Verified with a build
from a fresh tree with both submodules absent from disk.

Removes the submodules, the 7,680 ZAPD xmls under soh/assets/xml, the
extractor inputs (Config_*.xml, TexturePool.xml, filelists, symbols) and
copy-existing-otrs.cmake. The xmls remain in this repo's history and in
the test harness's pinned shipwright submodule, which is where the yaml
was generated from.

Packaging changes shape as well as content: the extractor assets used to
install into the 'extractor' component, which Packaging-2.cmake only
includes for the AppImage generator, so linux zips shipped without them.
torch is linked into soh rather than being a separate binary, so the yml
tree installs into 'ship' on every platform and every package can extract
a rom.

.gitmodules

@@ -2,12 +2,6 @@
 	path = libultraship
 	url = https://github.com/kenix3/libultraship.git
 	branch = port-maintenance
-[submodule "ZAPDTR"]
-	path = ZAPDTR
-	url = https://github.com/harbourmasters/ZAPDTR
-[submodule "OTRExporter"]
-	path = OTRExporter
-	url = https://github.com/harbourmasters/OTRExporter
 [submodule "soh/assets/yml"]
 	path = soh/assets/yml
 	url = https://github.com/briaguya0/soh-asset-yml.git