Minor resource pack related fixes (#7884)

src/main/java/net/minecraftforge/fmllegacy/packs/ModFileResourcePack.java

@@ -20,12 +20,12 @@
 package net.minecraftforge.fmllegacy.packs;
 
 import net.minecraft.server.packs.AbstractPackResources;
-import net.minecraft.server.packs.ResourcePackFileNotFoundException;
 import net.minecraft.server.packs.repository.Pack;
 import net.minecraft.server.packs.PackType;
 import net.minecraft.resources.ResourceLocation;
 
 import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Files;
@@ -66,7 +66,7 @@ public class ModFileResourcePack extends AbstractPackResources
     {
         final Path path = modFile.findResource(name);
         if(!Files.exists(path))
-            throw new ResourcePackFileNotFoundException(modFile.getFilePath().toFile(), name);
+            throw new FileNotFoundException("Can't find resource " + name + " at " + modFile.getFilePath().toString());
         return Files.newInputStream(path, StandardOpenOption.READ);
     }
 

src/main/java/net/minecraftforge/fmllegacy/packs/ResourcePackLoader.java

@@ -61,7 +61,7 @@ public class ResourcePackLoader {
     }
 
     public static List<String> getPackNames() {
-        return ModList.get().applyForEachModFile(mf->"mod:"+mf.getModInfos().get(0).getModId()).collect(Collectors.toList());
+        return ModList.get().applyForEachModFile(mf->"mod:"+mf.getModInfos().get(0).getModId()).filter(n->!n.equals("mod:minecraft")).collect(Collectors.toList());
     }
 
     public static <V> Comparator<Map.Entry<String,V>> getSorter() {