docs: remove outdated docs from BUILDING.md (HarbourMasters#3213)

docs/BUILDING.md

@@ -211,22 +211,7 @@ cmake --build build-wiiu --target soh # --target soh_wuhb (for building .wuhb)
 ```
 
 # Compatible Roms
-```
-OOT_PAL_GC      checksum 0x09465AC3
-OOT_PAL_GC_DBG1 checksum 0x871E1C92 (debug non-master quest)
-```
-
-# OTRExporter Usage
-
-The OTRExporter exports an `oot.otr` archive file which Ship of Harkinian requires to play.
-
-Use the `extract_assets.py` script file to run the exporter using any of the following methods:
-1) Double click on the script after placing one or more roms in the directory.
-2) Drag & Drop a rom onto the script.
-3) In a terminal run `python3 extract_assets.py` after placing one or more roms in the directory.
-4) In a terminal run `python3 extract_assets.py <path_to_rom>`
-
-If the script finds multiple roms the user is prompted which to use. Selection is done using the number keys and then pressing the carriage return key.
+See [`supportedHashes.json`](supportedHashes.json)
 
 ## Getting CI to work on your fork