Experimental: trim down 'generateBuildDbScript' to only fetch AED

scripts/osm2pgsql/generateBuildDbScript.ts

@@ -192,6 +192,9 @@ class GenerateBuildDbScript extends Script {
         const allLayers = new ValidateThemeEnsemble().convertStrict(
             AllKnownLayouts.allKnownLayouts.values()
         )
+        const aed = allLayers.get("defibrillator")
+        allLayers.clear()
+        allLayers.set("defibrillator", aed)
         if (allLayers.size === 0) {
             throw "No layers found at all"
         }