rolled back to inventory with only canonical symbols

reverting because the changes raise problems. re: #792

corpustools/corpus/classes/lexicon.py

@@ -3269,13 +3269,6 @@ def add_word(self, word, allow_duplicates=False):
             #in this case, the symbol has been given a default value of 'n' for every feature
             word.transcription._list = [self.inventory[x].symbol for x in word.transcription._list]
 
-        # make shift code for adding variant segs to the inventory. Need to be removed eventually
-        added_default_var = False
-        for alt_trans in word.alt_transcriptions:
-            if getattr(word, alt_trans) is not None:
-                added_default_var = self.update_inventory(getattr(word, alt_trans))
-                # word.transcription._list = [self.inventory[x].symbol for x in word.transcription._list]
-
         for d in word.descriptors:
             if d not in self._attributes:
                 if isinstance(getattr(word, d), str):
@@ -3291,7 +3284,7 @@ def add_word(self, word, allow_duplicates=False):
                 word.add_attribute(a.name, a.default_value)
             a.update_range(getattr(word, a.name))
 
-        return added_default or added_default_var
+        return added_default
 
     def update_features(self):
         for seg in self.inventory:

corpustools/corpus/classes/spontaneous.py

@@ -234,11 +234,6 @@ def add_word(self, wordtoken):
                 wordtoken.add_attribute(a.name, a.default_value)
             a.update_range(getattr(wordtoken,a.name))
 
-        added_default_var = False
-        if wordtoken.transcription is not None:
-            added_default_var = self.lexicon.update_inventory(wordtoken.transcription)
-        return added_default_var
-
     def add_attribute(self, attribute, initialize_defaults = False):
         """
         Add an Attribute of any type to the Discourse or replace an existing Attribute.