Remove map download, always use generated blank map

The smoke test was failing trying to download and use Comet Catcher Redux.
SpringBoard editor normally starts with generated maps, not downloaded ones.

Changes:
- Removed "Download test map" step entirely
- Removed ALSA null device configuration (Sound = 0 handles audio)
- Simplified script.txt creation to always use sb_initial_blank_10x8
- Uses MapSeed and new_map_x/new_map_y modoptions for map generation

This matches how SpringBoard editor normally starts.

Author: claude

.github/workflows/smoke-test.yml

@@ -56,30 +56,6 @@ jobs:
           ln -s "$(pwd)" "games/SpringBoard Core.sdd"
           ls -lah games/
 
-      - name: Download test map
-        run: |
-          mkdir -p maps
-          cd maps
-          echo "Downloading Comet Catcher Redux map for testing..."
-          wget -q "http://springfiles.springrts.com/spring/spring-maps/Comet%20Catcher%20Redux%201.8.sd7" -O "Comet_Catcher_Redux_1.8.sd7" || {
-            echo "Map download failed, will try to use generated blank map"
-          }
-          cd ..
-
-      - name: Create ALSA null device configuration
-        run: |
-          # Create ALSA config to use null device (no sound card in CI)
-          mkdir -p ~/.config/alsa
-          cat > ~/.config/alsa/asoundrc << 'EOF'
-          pcm.!default {
-            type plug
-            slave.pcm "null"
-          }
-          pcm.null {
-            type null
-          }
-          EOF
-
       - name: Create Spring config to disable audio
         run: |
           # Create springsettings.cfg to disable audio (no sound card in CI)
@@ -94,41 +70,9 @@ jobs:
 
       - name: Create Spring script.txt
         run: |
-          # Try to use downloaded map, fallback to blank map
-          if [ -f maps/Comet_Catcher_Redux_1.8.sd7 ]; then
-            MAP_NAME="Comet Catcher Redux 1.8"
-            echo "Using downloaded map: $MAP_NAME"
-            cat > script.txt << 'SCRIPTEND'
-          [GAME]
-          {
-            GameType=SpringBoard Core;
-            MapName=Comet Catcher Redux 1.8;
-            IsHost=1;
-            MyPlayerName=TestPlayer;
-            [MODOPTIONS]
-            {
-              MapSeed=42;
-            }
-            [PLAYER0]
-            {
-              Name=TestPlayer;
-              Team=0;
-              IsFromDemo=0;
-              Spectator=1;
-            }
-            [TEAM0]
-            {
-              TeamLeader=0;
-              AllyTeam=0;
-            }
-            [ALLYTEAM0]
-            {
-            }
-          }
-          SCRIPTEND
-          else
-            echo "Using generated blank map"
-            cat > script.txt << 'SCRIPTEND'
+          # Use generated blank map (how SpringBoard editor normally starts)
+          echo "Using generated blank map (10x8)"
+          cat > script.txt << 'SCRIPTEND'
           [GAME]
           {
             GameType=SpringBoard Core;
@@ -158,7 +102,6 @@ jobs:
             }
           }
           SCRIPTEND
-          fi
 
           echo "=== Script contents ==="
           cat script.txt