Don't set stress_flags with language option "stressRule".

Language option "stressOpt" already handles separate flags instead of a
single integer. There's no reason to have two ways of setting the same
option.

docs/voices.md

 
 ### stressRule
 
-	stressRule <4 integer values>
+	stressRule <3 integer values>
 
-Four integer parameters. These correspond to:
+Three integer parameters. These correspond to:
 
 1. langopts->stress_rule (values in [translate.h](../src/libespeak-ng/translate.h))
-2. langopts->stress_flags
 3. langopts->unstressed_wd1 (stress for $u word of 1 syllable)
 4. langopts->unstressed_wd2 (stress for $u word of >1 syllable) 
 

espeak-ng-data/lang/itc/la

 name Latin
 language la
-stressRule 2 33 0 2
+stressRule 2 0 2
 // rule=penultimate
-// flags=0100001 (no automatic secondary stress + don't stres monosyllables)
 // unstressed_wd1=0
 // unstressed_wd2=2
+stressOpt 0 5 // flags=0100001 (no automatic secondary stress + don't stres monosyllables)
 
 // short gap between words
 words 2

src/libespeak-ng/voices.c

 			if (CheckTranslator(translator, keyword_tab, key) != 0)
 				break;
 
-			sscanf(p, "%d %d %d %d", &translator->langopts.stress_rule,
-			       &translator->langopts.stress_flags,
+			sscanf(p, "%d %d %d", &translator->langopts.stress_rule,
 			       &translator->langopts.unstressed_wd1,
 			       &translator->langopts.unstressed_wd2);