code cleanup: remove dead code for Divehi (dv)

The language is not supported and apparently never has been.

Makefile.am

@@ -337,7 +337,6 @@ phsource/phonemes.stamp: \
 	phsource/ph_czech \
 	phsource/ph_danish \
 	phsource/ph_dari \
-	phsource/ph_divehi \
 	phsource/ph_dutch \
 	phsource/ph_english \
 	phsource/ph_english_n \

phsource/ph_divehi

@@ -1,95 +0,0 @@
-
-// Phonemes for Divehi
-// This inherits from ph_hindi
-
-
-
-phoneme a
-  vwl  starttype #a  endtype #a
-  length 130
-  ChangeIfDiminished(V)    // ?? final syllable of word
-  FMT(vowel/a#)
-endphoneme
-
-
-phoneme a:
-  vwl  starttype #a  endtype #a
-  length 300
-  FMT(vowel/a#)
-endphoneme
-
-
-phoneme e
-  vwl  starttype #e  endtype #e
-  length 130
-  FMT(vowel/e)
-endphoneme
-
-
-phoneme e:
-  vwl  starttype #e  endtype #e
-  length 250
-  FMT(vowel/e)
-endphoneme
-
-
-phoneme i
-  vwl  starttype #i  endtype #i
-  length 130
-  FMT(vowel/i_6)
-endphoneme
-
-
-phoneme i:
-  vwl  starttype #i  endtype #i
-  length 270
-  FMT(vowel/i)
-endphoneme
-
-
-
-phoneme o
-  vwl  starttype #o  endtype #o
-  length 130
-  FMT(vowel/o_mid)
-endphoneme
-
-
-phoneme o:
-  vwl  starttype #o  endtype #o
-  length 300
-  FMT(vowel/o_mid)
-endphoneme
-
-
-phoneme u
-  vwl  starttype #u  endtype #u
-  length 110
-  FMT(vowel/u_6)
-endphoneme
-
-
-phoneme u:
-  vwl  starttype #u  endtype #u
-  length 290
-  FMT(vowel/u_6)
-endphoneme
-
-
-phoneme aI
-  vwl  starttype #a  endtype #i
-  length 280
-  FMT(vdiph/ai_8)
-endphoneme
-
-
-
-phoneme t
-  import_phoneme base2/t    // dental
-endphoneme
-
-// ?? This is standard [v].  Should be it [v] without the fricative noise?
-phoneme v
-  import_phoneme base1/v
-endphoneme
-

phsource/phonemes

@@ -1968,9 +1968,6 @@ include ph_marathi
 phonemetable kok hi_base
 include ph_konkani
 
-phonemetable dv hi_base
-include ph_divehi
-
 phonemetable te hi_base
 include ph_telugu
 

src/libespeak-ng/tr_languages.c

@@ -39,7 +39,6 @@
 #define OFFSET_HEBREW   0x590
 #define OFFSET_ARABIC   0x600
 #define OFFSET_SYRIAC   0x700
-#define OFFSET_THAANA   0x780 // Divehi/Maldives
 #define OFFSET_DEVANAGARI  0x900
 #define OFFSET_BENGALI  0x980
 #define OFFSET_GURMUKHI 0xa00
@@ -66,7 +65,6 @@ ALPHABET alphabets[] = {
 	{ "_he",    OFFSET_HEBREW,   0x590, 0x5ff,  0, 0 },
 	{ "_ar",    OFFSET_ARABIC,   0x600, 0x6ff,  0, 0 },
 	{ "_syc",   OFFSET_SYRIAC,   0x700, 0x74f,  0, 0 },
-	{ "_dv",    OFFSET_THAANA,   0x780, 0x7bf,  0, 0 },
 	{ "_hi",    OFFSET_DEVANAGARI, 0x900, 0x97f, L('h', 'i'), AL_WORDS },
 	{ "_bn",    OFFSET_BENGALI,  0x0980, 0x9ff, L('b', 'n'), AL_WORDS },
 	{ "_gur",   OFFSET_GURMUKHI, 0xa00, 0xa7f,  L('p', 'a'), AL_WORDS },
@@ -623,19 +621,6 @@ Translator *SelectTranslator(const char *name)
 		tr->langopts.param[LOPT_UNPRONOUNCABLE] = 2; // use de_rules for unpronouncable rules
 	}
 		break;
-	case L('d', 'v'): // Divehi (Maldives) FIXME: this language code is actually never used
-	{
-		SetupTranslator(tr, stress_lengths_ta, stress_amps_ta);
-		tr->langopts.param[LOPT_UNPRONOUNCABLE] = 1; // disable check for unpronouncable words
-		tr->langopts.length_mods0 = tr->langopts.length_mods; // don't lengthen vowels in the last syllable
-		tr->letter_bits_offset = OFFSET_THAANA;
-		tr->langopts.stress_rule = STRESSPOSN_1L;
-		tr->langopts.stress_flags =  S_MID_DIM | S_FINAL_DIM; // use 'diminished' for unstressed final syllable
-		SetLetterBitsRange(tr, LETTERGP_B, 0x26, 0x30); // vowel signs, and virama
-		tr->langopts.break_numbers = BREAK_LAKH_DV;
-		tr->langopts.numbers = NUM_DEFAULT;
-	}
-		break;
 	case L('e', 'n'):
 	{
 		static const short stress_lengths_en[8] = { 182, 140, 220, 220, 0, 0, 248, 275 };

src/libespeak-ng/translate.c

@@ -221,9 +221,6 @@ int IsAlpha(unsigned int c)
 	if ((c >= 0x300) && (c <= 0x36f))
 		return 1; // combining accents
 
-	if ((c >= 0x780) && (c <= 0x7b1))
-		return 1; // taani/divehi (maldives)
-
 	if ((c >= 0xf40) && (c <= 0xfbc))
 		return 1; // tibetan