fix(core): deprecate nlp rules

closed #54

@commitlint/config-angular/index.js

@@ -1,15 +1,11 @@
 module.exports = {
 	rules: {
 		'body-leading-blank': [1, 'always'],
-		'body-tense': [1, 'always', ['present-imperative']],
 		'footer-leading-blank': [1, 'always'],
-		'footer-tense': [1, 'always', ['present-imperative']],
 		'header-max-length': [2, 'always', 72],
-		lang: [1, 'always', 'eng'],
 		'scope-case': [2, 'always', 'lowerCase'],
 		'subject-empty': [2, 'never'],
 		'subject-full-stop': [2, 'never', '.'],
-		'subject-tense': [1, 'always', ['present-imperative']],
 		'type-case': [2, 'always', 'lowerCase'],
 		'type-empty': [2, 'never'],
 		'type-enum': [

@commitlint/core/package.json

@@ -90,10 +90,8 @@
     "conventional-commits-parser": "^1.3.0",
     "cosmiconfig": "^3.0.1",
     "find-up": "^2.1.0",
-    "franc": "^2.0.0",
     "lodash": "^4.17.4",
     "path-exists": "^3.0.0",
-    "pos": "^0.4.2",
     "resolve-from": "^3.0.0",
     "semver": "^5.3.0"
   }

@commitlint/core/src/lint.js

@@ -43,9 +43,10 @@ export default async (message, rules = {}, opts = {}) => {
 		})
 		.filter(Boolean);
 
-	const errors = results.filter(result => result.level > 1 && !result.valid);
-
-	const warnings = results.filter(result => result.level < 2 && !result.valid);
+	const errors = results.filter(result => result.level === 2 && !result.valid);
+	const warnings = results.filter(
+		result => result.level === 1 && !result.valid
+	);
 
 	const valid = errors.length === 0;
 
@@ -55,4 +56,3 @@ export default async (message, rules = {}, opts = {}) => {
 		warnings
 	};
 };
-

@commitlint/core/src/rules/body-tense.js

@@ -1,23 +1,6 @@
-import ensureTense from '../library/ensure-tense';
-import message from '../library/message';
-
 export default (parsed, when, value) => {
-	const tenses = Array.isArray(value) ? value : value.allowed || [];
-	const ignoreConfig = Array.isArray(value) ? [] : value.ignored || [];
-
-	const negated = when === 'never';
-	const ignored = [...ignoreConfig, ...parsed.notes.map(note => note.title)];
-	const {matches, offending} = ensureTense(parsed.body, tenses, {ignored});
-	const offenders = offending
-		.map(item => [item.lemma, item.tense].join(' - '))
-		.join(',');
-
 	return [
-		negated ? !matches : matches,
-		message([
-			`tense of body must`,
-			negated ? `not` : null,
-			`be ${value}. Verbs in other tenses: ${offenders}`
-		])
+		false,
+		`rules.body-tense is deprecated. Received [${when}, [${value.join(', ')}]]`
 	];
 };