remove more unnecessary speech.h includes

src/libespeak-ng/compiledata.c

 #include <espeak-ng/encoding.h>
 
 #include "error.h"
-#include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
 #include "synthesize.h"

src/libespeak-ng/espeak_api.c

 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
-#include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
 #include "synthesize.h"

src/libespeak-ng/espeak_command.c

 
 #include <espeak-ng/espeak_ng.h>
 
-#include "speech.h"
 #include "espeak_command.h"
 
 #ifdef USE_ASYNC

src/libespeak-ng/event.c

 #include <espeak-ng/espeak_ng.h>
 #include <espeak-ng/speak_lib.h>
 
-#include "speech.h"
 #include "event.h"
 
 // my_mutex: protects my_thread_is_talking,

src/libespeak-ng/intonation.c

 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
-#include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
 #include "synthesize.h"

src/libespeak-ng/mbrowrap.c

 #include <unistd.h>
 
 #include <espeak-ng/espeak_ng.h>
-#include "speech.h"
 
 /*
  * mbrola instance parameters

src/libespeak-ng/numbers.c

 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
-#include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
 #include "synthesize.h"

src/libespeak-ng/phonemelist.c

 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
-#include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
 #include "synthesize.h"

src/libespeak-ng/setlengths.c

 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
-#include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
 #include "synthesize.h"

src/libespeak-ng/synthesize.h

 #ifndef ESPEAK_NG_SYNTHESIZE_H
 #define ESPEAK_NG_SYNTHESIZE_H
 
-#include "speech.h"
-
 #ifdef __cplusplus
 extern "C"
 {

src/libespeak-ng/tr_languages.c

 #include <espeak-ng/speak_lib.h>
 #include <espeak-ng/encoding.h>
 
-#include "speech.h"
 #include "phoneme.h"
 #include "voice.h"
 #include "synthesize.h"