Fix English grammatical error

src/api/endpoints/posts/favorites/create.js

@@ -31,7 +31,7 @@ module.exports = (params, user) =>
 			return rej('post not found');
 		}
 
-		// Check already favorited
+		// already favorited
 		const exist = await Favorite.findOne({
 			post_id: post._id,
 			user_id: user._id

src/api/endpoints/posts/favorites/delete.js

@@ -31,7 +31,7 @@ module.exports = (params, user) =>
 			return rej('post not found');
 		}
 
-		// Check already favorited
+		// already favorited
 		const exist = await Favorite.findOne({
 			post_id: post._id,
 			user_id: user._id

src/api/endpoints/posts/likes/create.js

@@ -43,7 +43,7 @@ module.exports = (params, user) =>
 			return rej('-need-translate-');
 		}
 
-		// Check already liked
+		// already liked
 		const exist = await Like.findOne({
 			post_id: post._id,
 			user_id: user._id,

src/api/endpoints/posts/likes/delete.js

@@ -38,7 +38,7 @@ module.exports = (params, user) =>
 			return rej('post not found');
 		}
 
-		// Check already liked
+		// already liked
 		const exist = await Like.findOne({
 			post_id: post._id,
 			user_id: user._id,

src/api/endpoints/posts/polls/vote.js

@@ -52,7 +52,7 @@ module.exports = (params, user) =>
 			return rej('invalid choice');
 		}
 
-		// Check already voted
+		// already voted
 		const exist = await Vote.findOne({
 			post_id: post._id,
 			user_id: user._id