first commit for the new structure of directories of levels like as @schokotets suggestion

levels/low-level/en/index-remove

@@ -0,0 +1,29 @@
+[description]
+
+To remove an entry from the index, use a command like this:
+
+    git update-index --force-remove <file>
+
+Remove all entries from the index!
+
+[setup]
+
+echo "file 1" > file1
+echo "file 2" > file2
+echo "file 3" > file3
+git add .
+
+[setup goal]
+
+echo "file 1" > file1
+echo "file 2" > file2
+echo "file 3" > file3
+git add .
+
+git update-index --force-remove file1
+git update-index --force-remove file2
+git update-index --force-remove file3
+
+[win]
+
+test "$(git ls-files | wc -l)" -eq 0