code cleanup: remove unused width2.

It is set but never used.

src/libespeak-ng/voice.h

@@ -64,7 +64,6 @@ typedef struct {
 	// copies without temporary adjustments from embedded commands
 	short freq2[N_PEAKS];    // 100% = 256
 	short height2[N_PEAKS];  // 100% = 256
-	short width2[N_PEAKS];   // 100% = 256
 
 	int breath[N_PEAKS];  // amount of breath for each formant. breath[0] indicates whether any are set.
 	int breathw[N_PEAKS]; // width of each breath formant

src/libespeak-ng/voices.c

@@ -867,7 +867,6 @@ voice_t *LoadVoice(const char *vname, int control)
 	for (ix = 0; ix < N_PEAKS; ix++) {
 		voice->freq2[ix] = voice->freq[ix];
 		voice->height2[ix] = voice->height[ix];
-		voice->width2[ix] = voice->width[ix];
 	}
 
 	if (tone_only)