Experimental parser: remove bom handling

tools/lexer_generator/code_generator.py

Index: tools/lexer_generator/code_generator.py
diff --git a/tools/lexer_generator/code_generator.py b/tools/lexer_generator/code_generator.py
index c98110fa2b8d84add2cf890956f4d35067b1da29..907d7e6c22c6f94e7a5ce4b6b39d70aa07a2a859 100644
--- a/tools/lexer_generator/code_generator.py
+++ b/tools/lexer_generator/code_generator.py
@@ -205,15 +205,12 @@ class CodeGenerator:
     if not transitions:
       return
     encoding = self.__dfa.encoding()
-    bom = 'byte_order_mark'
     catch_all = 'non_primary_everything_else'
     all_classes = set(encoding.class_name_iter())
-    call_classes = all_classes - set([bom, catch_all])
+    call_classes = all_classes - set([catch_all])
     def remap_transition(class_name):
       if class_name in call_classes:
         return ('LONG_CHAR_CLASS', 'call', self.__call_map[class_name])
-      if class_name == bom:
-        return ('LONG_CHAR_CLASS', class_name)
       raise Exception(class_name)
     long_class_transitions = []
     long_class_map = {}