remove scaffolding for pre-defined exceptions

(not sure how they are supposed to work)

Author: frankrolf

kernFeatureWriter.py

@@ -26,7 +26,6 @@
 tag_ara = '_ARA'
 tag_heb = '_HEB'
 tag_rtl = '_RTL'
-tag_exception = 'EXC_'
 
 
 # helpers
@@ -200,15 +199,13 @@ def __init__(
         self.glyph_group_exceptions = {}
         self.group_glyph_exceptions = {}
         self.group_group = {}
-        self.predefined_exceptions = {}
 
         self.rtl_glyph_glyph = {}
         self.rtl_glyph_glyph_exceptions = {}
         self.rtl_glyph_group = {}
         self.rtl_glyph_group_exceptions = {}
         self.rtl_group_glyph_exceptions = {}
         self.rtl_group_group = {}
-        self.rtl_predefined_exceptions = {}
 
         self.pairs_unprocessed = []
         self.pairs_processed = []
@@ -395,11 +392,6 @@ def _find_exceptions(self):
                     del self.kerning[pair]
                     continue
 
-            # Filter pre-defined exception pairs.
-            if any([tag_exception in item for item in pair]):
-                self.predefined_exceptions[pair] = self.kerning[pair]
-                del self.kerning[pair]
-
         glyph_2_glyph = sorted(
             [pair for pair in self.kerning.keys() if(
                 not is_group(pair[0]) and
@@ -763,8 +755,6 @@ def _make_fea_data(self, kp):
         # ------------------
         order_ltr = [
             # container_dict, minKern, comment, enum
-            (kp.predefined_exceptions, 0,
-                '\n# pre-defined exceptions:', True),
             (kp.glyph_glyph, self.minKern,
                 '\n# glyph, glyph:', False),
             (kp.glyph_glyph_exceptions, 0,
@@ -786,8 +776,6 @@ def _make_fea_data(self, kp):
         # ------------------
         order_rtl = [
             # container_dict, minKern, comment, enum
-            (kp.rtl_predefined_exceptions, 0,
-                '\n# RTL pre-defined exceptions:', True),
             (kp.rtl_glyph_glyph, self.minKern,
                 '\n# RTL glyph, glyph:', False),
             (kp.rtl_glyph_glyph_exceptions, 0,