remove saving original from grammar

src/export.py

@@ -57,17 +57,12 @@ def export_entry(entry):
         lexunit.appendChild(lexeme)
         head.appendChild(lexunit)
 
-#   Example of keeping original xml and adding changes to it only
-    grammar_category = entry.original_xml.querySelector("head grammar category")
-    if grammar_category is None:
-        grammar = doc.createElement("grammar")
-        grammar_category = doc.createElement("category")
-        grammar.appendChild(grammar_category)
-        entry.original_xml.querySelector("head").appendChild(grammar_category)
 
+    grammar = doc.createElement("grammar")
+    grammar_category = doc.createElement("category")
     grammar_category.textContent = entry.grammar
-
-    head.appendChild(entry.original_xml.querySelector("head grammar"))
+    grammar.appendChild(grammar_category)
+    head.appendChild(grammar)
 
 
     if len(entry.measure) > 0: