Don't exclude the test voice directory.

This directory is no longer available, so the check is now
redundant.

src/libespeak-ng/voices.c

 		// select the voices which match the voice_spec, and sort them by preference
 		SetVoiceScores(voice_spec, voices, 1);
 	} else {
-		// list all: omit variant voices and mbrola voices and test voices
+		// list all: omit variant and mbrola voices
 		j = 0;
 		for (ix = 0; (v = voices_list[ix]) != NULL; ix++) {
 			if ((v->languages[0] != 0) && (strcmp(&v->languages[1], "variant") != 0)
-			    && (memcmp(v->identifier, "mb/", 3) != 0) && (memcmp(v->identifier, "test/", 5) != 0))
+			    && (memcmp(v->identifier, "mb/", 3) != 0))
 				voices[j++] = v;
 		}
 		voices[j] = NULL;