ar: remove wrongly declared letter groups

Letter groups A, B, C, E etc. should be redefined in C code
t https://github.com/espeak-ng/espeak-ng/blob/master/docs/dictionary.md#redefinition-of-charater-groups

dictsource/ar_rules

@@ -44,12 +44,6 @@
      ٩       9
      ۹       9
 
-//all vowels
-.A   ا ي و  َ ُ ِ ً ٌ ٍ ّ ى
-
-//list of consonants
-.C  ب پ ت ة ث ج ح خ د ذ ر ز  س ش ص ض ط  ظ ع غ ف ق ك ل م ن ئ ؤ ء أ آ إ ه
-
 //all vowels
 .L01   ا ي و   َ ُ ِ ً ٌ ٍ ّ ى