Fix clang -Wunused-macros warnings.

src/libespeak-ng/intonation.c

 #define PITCHrise     2
 #define PITCHfrise    4 // and 3 must be for the variant preceded by 'r'
 #define PITCHfrise2   6 // and 5 must be the 'r' variant
-#define PITCHrisefall 8
 
 unsigned char env_fall[128] = {
 	0xff, 0xfd, 0xfa, 0xf8, 0xf6, 0xf4, 0xf2, 0xf0, 0xee, 0xec, 0xea, 0xe8, 0xe6, 0xe4, 0xe2, 0xe0,

src/libespeak-ng/numbers.c

 #define L_OPEN_E  62 // U+25B
 #define L_GAMMA   63 // U+3B3
 #define L_IOTA    64 // U+3B9
-#define L_OE      65 // U+153
-#define L_OMEGA   66 // U+3C9
 
 #define L_PHI     67 // U+3C6
 #define L_ESH     68 // U+283

src/libespeak-ng/spect.c

 static int frame_width;
 int pk_select;
 
-#define DRAWPEAKWIDTH 2000
-#define PEAKSHAPEW 256
-
 static int default_freq[N_PEAKS] =
 { 200, 500, 1200, 3000, 3500, 4000, 6900, 7800, 9000 };
 static int default_width[N_PEAKS] =

src/libespeak-ng/tr_languages.c

 #include "synthesize.h"
 #include "translate.h"
 
-#define L_qa   0x716100
 #define L_grc  0x677263 // grc  Ancient Greek
 #define L_jbo  0x6a626f // jbo  Lojban
 #define L_mni  0x6d6e69 // mni  Manipuri
 #define L_pap  0x706170 // pap  Papiamento]
-#define L_qvi  0x717669 // qvi  Kichwa
-#define L_shs  0x736873 // shs  Shuswap / Secwepemctsin
 #define L_zhy  0x7a6879 // zhy
 
 // start of unicode pages for character sets

src/libespeak-ng/translate.c

 #include "voice.h"
 #include "translate.h"
 
-#define WORD_STRESS_CHAR   '*'
-
 Translator *translator = NULL; // the main translator
 Translator *translator2 = NULL; // secondary translator for certain words
 static char translator2_language[20] = { 0 };

src/libespeak-ng/wave.c

 
 static t_wave_callback *my_callback_is_output_enabled = NULL;
 
-#define N_WAV_BUF   10
 #define MAX_SAMPLE_RATE 22050
 #define FRAMES_PER_BUFFER 512
 #define BUFFER_LENGTH (MAX_SAMPLE_RATE*2*sizeof(uint16_t))

src/libespeak-ng/wave_pulse.c

 #define TLENGTH 4410
 #define PREBUF 2200
 #define MINREQ 880
-#define FRAGSIZE 0
 
 #ifdef USE_PORTAUDIO
 // rename functions to be wrapped

src/libespeak-ng/wavegen.c

 #endif
 #endif
 
-#define N_SINTAB  2048
 #include "sintab.h"
 
 #define PI  3.1415927
 int embedded_default[N_EMBEDDED_VALUES]    = { 0,     50, 175, 100, 50,  0,  0, 0, 175, 0, 0, 0, 0, 0, 0 };
 static int embedded_max[N_EMBEDDED_VALUES] = { 0, 0x7fff, 750, 300, 99, 99, 99, 0, 750, 0, 0, 0, 0, 4, 0 };
 
-#define N_CALLBACK_IX N_WAV_BUF-2 // adjust this delay to match display with the currently spoken word
 int current_source_index = 0;
 
 extern FILE *f_wave;