CI: add sountfont, not download

The size is only some 90 kB when compressed so it is perhaps not worth
downloading from external source and depend on it.

It could be even bundled directly, not by CI. Now it is actually the case
in Linux (create-appimage.sh) but it is also possible for other platforms.

.github/scripts/Linux/prepare.sh

@@ -53,11 +53,6 @@ sudo apt --no-install-recommends install asciidoc xmlto
 
 sudo apt install qtbase5-dev
 
-. "$GITHUB_WORKSPACE/.github/scripts/defs.sh"
-sf=$(basename "$DEFAULT_SF_URL")
-curl -L "$DEFAULT_SF_URL" -o "$HOME/$sf"
-printf '%b' "SDL_SOUNDFONTS=$HOME/$sf\n" >> "$GITHUB_ENV"
-
 # Install cross-platform deps
 "$GITHUB_WORKSPACE/.github/scripts/install-common-deps.sh"
 

.github/scripts/Windows/prepare_msys.sh

@@ -100,10 +100,9 @@ https://github.com/CESNET/GPUJPEG/releases/download/continuous/GPUJPEG.zip
 )}
 
 install_soundfont() {
-        . "$GITHUB_WORKSPACE/.github/scripts/defs.sh"
         sf_dir="$GITHUB_WORKSPACE/data/Windows/share/soundfonts"
         mkdir -p "$sf_dir"
-        curl -L "$DEFAULT_SF_URL" -o "$sf_dir/default.${DEFAULT_SF_URL##*.}"
+        cp "$GITHUB_WORKSPACE/data/default.sf3" "$sf_dir"
 }
 
 # Install cross-platform deps

.github/scripts/defs.sh

@@ -1 +0,0 @@
-DEFAULT_SF_URL=http://frakira.fi.muni.cz/~xpulec/TimGM6mb_but_fixed__piano_.sf3 # https://musical-artifacts.com/artifacts/2642

.github/scripts/macOS/install_others.sh

@@ -98,10 +98,9 @@ install_live555() {(
 )}
 
 install_soundfont() {(
-        . "$srcroot/.github/scripts/defs.sh"
         sf_dir="$srcroot/data/MacOS-bundle-template/Contents/share/soundfonts"
         mkdir -p "$sf_dir"
-        curl -L "$DEFAULT_SF_URL" -o "$sf_dir/default.${DEFAULT_SF_URL##*.}"
+        cp "$GITHUB_WORKSPACE/data/default.sf3" "$sf_dir"
 )}
 
 install_syphon() {