[myanmar] Don’t disable liga feature

This seems to have been carried over from the Indic shaper, but
Uniscribe enables it by default.

See https://github.com/harfbuzz/harfbuzz/issues/2213#issuecomment-686062915

src/hb-ot-shape-complex-myanmar.cc

@@ -97,12 +97,6 @@ collect_features_myanmar (hb_ot_shape_planner_t *plan)
     map->enable_feature (myanmar_other_features[i], F_MANUAL_ZWJ);
 }
 
-static void
-override_features_myanmar (hb_ot_shape_planner_t *plan)
-{
-  plan->map.disable_feature (HB_TAG('l','i','g','a'));
-}
-
 
 enum myanmar_syllable_type_t {
   myanmar_consonant_syllable,
@@ -346,7 +340,7 @@ reorder_myanmar (const hb_ot_shape_plan_t *plan,
 const hb_ot_complex_shaper_t _hb_ot_complex_shaper_myanmar =
 {
   collect_features_myanmar,
-  override_features_myanmar,
+  nullptr, /* override_features */
   nullptr, /* data_create */
   nullptr, /* data_destroy */
   nullptr, /* preprocess_text */

test/shaping/data/in-house/Makefile.sources

@@ -38,6 +38,7 @@ TESTS = \
 	tests/mark-attachment.tests \
 	tests/mark-filtering-sets.tests \
 	tests/mongolian-variation-selector.tests \
+	tests/myanmar-misc.tests \
 	tests/myanmar-syllable.tests \
 	tests/myanmar-zawgyi.tests \
 	tests/none-directional.tests \

test/shaping/data/in-house/meson.build

@@ -38,6 +38,7 @@ in_house_tests = [
   'mark-attachment.tests',
   'mark-filtering-sets.tests',
   'mongolian-variation-selector.tests',
+  'myanmar-misc.tests',
   'myanmar-syllable.tests',
   'myanmar-zawgyi.tests',
   'none-directional.tests',

test/shaping/data/in-house/tests/myanmar-misc.tests

@@ -0,0 +1 @@
+../fonts/065b01e54f35f0d849fd43bd5b936212739a50cb.ttf::U+101A,U+1035:[ya_e_above=0+1000]