improved git commit fetching

build.sh

@@ -10,12 +10,4 @@ mkdir tmp tmp/pkg
 cp -r pkg/integral_site_bg.wasm pkg/integral_site.js tmp/pkg/
 cp www/index.html www/style.css tmp/
 
-sed -i 's/\.\.\/pkg/\.\/pkg/g' tmp/index.html
-
-git ls-files --exclude-standard --others . >/dev/null 2>&1; ec=$?
-if test "$ec" = 0; then
-    echo some untracked files
-elif test "$ec" = 1; then
-    commit=$(git rev-parse HEAD)
-    sed -i "s/let commit = ''/let commit = '${commit}'/g" tmp/index.html
-fi
+sed -i 's/\.\.\/pkg/\.\/pkg/g' tmp/index.html