Fix some "unused imports" warnings

src/core/types/inline_query_result_contact.rs

@@ -1,6 +1,4 @@
-use crate::core::types::{
-    InlineKeyboardMarkup, InputMessageContent, ParseMode,
-};
+use crate::core::types::{InlineKeyboardMarkup, InputMessageContent};
 
 #[derive(Debug, Serialize, PartialEq, Clone)]
 pub struct InlineQueryResultContact {

src/core/types/inline_query_result_game.rs

@@ -1,6 +1,4 @@
-use crate::core::types::{
-    InlineKeyboardMarkup, InputMessageContent, ParseMode,
-};
+use crate::core::types::InlineKeyboardMarkup;
 
 #[derive(Debug, Serialize, Hash, PartialEq, Eq, Clone)]
 pub struct InlineQueryResultGame {

src/core/types/inline_query_result_location.rs

@@ -1,6 +1,4 @@
-use crate::core::types::{
-    InlineKeyboardMarkup, InputMessageContent, ParseMode,
-};
+use crate::core::types::{InlineKeyboardMarkup, InputMessageContent};
 
 #[derive(Debug, Serialize, PartialEq, Clone)]
 pub struct InlineQueryResultLocation {

src/core/types/inline_query_result_photo.rs

@@ -2,6 +2,9 @@ use crate::core::types::{
     InlineKeyboardMarkup, InputMessageContent, ParseMode,
 };
 
+/// Represents a link to a photo. By default, this photo will be sent by the
+/// user with optional caption. Alternatively, you can use input_message_content
+/// to send a message with the specified content instead of the photo.
 #[derive(Debug, Serialize, PartialEq, Clone)]
 pub struct InlineQueryResultPhoto {
     pub id: String,

src/core/types/inline_query_result_venue.rs

@@ -1,6 +1,4 @@
-use crate::core::types::{
-    InlineKeyboardMarkup, InputMessageContent, ParseMode,
-};
+use crate::core::types::{InlineKeyboardMarkup, InputMessageContent};
 
 #[derive(Debug, Serialize, PartialEq, Clone)]
 pub struct InlineQueryResultVenue {