Citra: Convert include into forward declaration

src/citra/config.cpp

@@ -5,11 +5,11 @@
 #include <memory>
 #include <SDL.h>
 #include <inih/cpp/INIReader.h>
+#include "citra/config.h"
 #include "citra/default_ini.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
 #include "common/param_package.h"
-#include "config.h"
 #include "core/settings.h"
 #include "input_common/main.h"
 
@@ -21,6 +21,8 @@ Config::Config() {
     Reload();
 }
 
+Config::~Config() = default;
+
 bool Config::LoadINI(const std::string& default_contents, bool retry) {
     const char* location = this->sdl2_config_loc.c_str();
     if (sdl2_config->ParseError() < 0) {

src/citra/config.h

@@ -6,7 +6,8 @@
 
 #include <memory>
 #include <string>
-#include <inih/cpp/INIReader.h>
+
+class INIReader;
 
 class Config {
     std::unique_ptr<INIReader> sdl2_config;
@@ -17,6 +18,7 @@ class Config {
 
 public:
     Config();
+    ~Config();
 
     void Reload();
 };