Remove the dontlist phoneme feature flag.

The 'dontlist' feature was used by the now removed PrintPhonemesUsed
function to not display that phoneme in the list. It was also only
used by the English phonemetable.

phsource/ph_english

 
 phoneme t2   // [t] which doesn't reduce
-  vcd alv stop dontlist
+  vcd alv stop
   ChangePhoneme(t)
 endphoneme
 
 
 
 phoneme d#    // change to [d] or [t] depending on whether previous phoneme is voiced
-  vls alv stop dontlist
+  vls alv stop
   IF prevPh(isVoiced) THEN
     ChangePhoneme(d)
   ELSE
 
 
 phoneme z#    // change to [z] or [s] depending on whether previous phoneme is voiced
-  vls alv frc sibilant dontlist
+  vls alv frc sibilant
   IF prevPh(isVoiced) THEN
     ChangePhoneme(z)
   ELSE
 
 phoneme @2   //  Schwa, changes to I before a vowel. th**e**, used only for "the".
   vowel  starttype #@  endtype #@
-  unstressed dontlist
+  unstressed
   length 120
   IF nextPh(isVowel) THEN
     ChangePhoneme(I2)
 
 phoneme @5   //  Schwa, changes to U before a vowel. t**o**, used only for "to".
   vowel  starttype #@  endtype #@
-  unstressed dontlist
+  unstressed
   length 140
   IF nextPh(isVowel) OR nextPh(isPause) THEN
     ChangePhoneme(U)
 
 
 phoneme a2  // don't reduce to a#
-  vowel dontlist
+  vowel
   ChangePhoneme(a)
 endphoneme
 
 
 phoneme E#    // [@] in unstressed syllables, if next vowel is stressed
   vowel  starttype #e  endtype #e
-  dontlist
 
   IF thisPh(isUnstressed) AND nextVowel(isVowel) AND nextVowel(isStressed) THEN
     ChangePhoneme(@)
 
 phoneme E2  // does not reduce in unstressed syllables
   vowel  starttype #e  endtype #e
-  dontlist
   length 140
   ChangePhoneme(E)  // a second change ([E]  to [I2]) won't happen
 endphoneme
 
 phoneme 0#    // [@] in unstressed syllables
   vowel  starttype #o  endtype #o
-  dontlist
 
   IF thisPh(isUnstressed) AND nextVowel(isVowel) AND NOT nextVowel(isUnstressed) THEN
     ChangePhoneme(@)
 
 phoneme 02   // becomes V in en-us
   vowel  starttype #o  endtype #o
-  dontlist
   length 140
   ChangePhoneme(0)
 endphoneme
 
 phoneme A#    // [a] in British [A:] in American
   vowel  starttype #a  endtype #a
-  dontlist
   ChangePhoneme(a)
 endphoneme
 
 
 
 phoneme oU#
-  vowel dontlist
+  vowel
   IF thisPh(isStressed) THEN
     ChangePhoneme(0)
   ENDIF
 
 
 phoneme a#2  // for word 'an'
-  vowel dontlist
+  vowel
   IF next2Ph(isVowel) THEN
     ChangePhoneme(a#)
   ELSE

src/libespeak-ng/compiledata.c

 	{ "trill",        tPHONEME_FLAG, phTRILL }, // TODO (deprecated): use 'trl' instead
 	{ "palatal",      tPHONEME_FLAG, phPALATAL }, // TODO (deprecated): use 'pzd' instead
 	{ "long",         tPHONEME_FLAG, phLONG }, // TODO (deprecated): use 'lng' instead
-	{ "dontlist",     tPHONEME_FLAG, phDONTLIST },
 	{ "brkafter",     tPHONEME_FLAG, phBRKAFTER },
 	{ "rhotic",       tPHONEME_FLAG, phRHOTIC }, // TODO (deprecated): use 'rzd' instead
 	{ "nonsyllabic",  tPHONEME_FLAG, phNONSYLLABIC }, // TODO (deprecated): use 'nsy' instead

src/libespeak-ng/phoneme.h

 #define phTRILL    0x80
 #define phPALATAL  0x200
 #define phSINGLE_INSTN  0x1000    // this phoneme has a single instruction program, with an implicit Return
-#define phDONTLIST 0x2000  // don't list in dict_phonemes
 #define phBRKAFTER 0x4000  // [*] add a post-pause
 
 #define phNONSYLLABIC  0x100000   // don't count this vowel as a syllable when finding the stress position