Cleaned up MSVC 2013 compatibility code

We no longer support that compiler.

(cherry-picked from commit 1e9f2548a6)

src/gui/dialogs/loading_screen.cpp

@@ -199,10 +199,7 @@ loading_screen::~loading_screen()
 	 * to end the thread faster.
 	 */
 	if(is_worker_running_) {
-#if defined(_MSC_VER) && _MSC_VER <= 1800
-		HANDLE process = GetCurrentProcess();
-		TerminateProcess(process, 0u);
-#elif defined(_LIBCPP_VERSION) || defined(__MINGW32__)
+#if defined(_LIBCPP_VERSION) || defined(__MINGW32__)
 		std::_Exit(0);
 #else
 		std::quick_exit(0);

src/gui/widgets/grid.hpp

@@ -343,16 +343,7 @@ private:
 		 * of copied when the grid's child vector is resized. std::vector will
 		 * utilize a move constructor as long as a non-throwing one is provided.
 		 */
-#if defined(_MSC_VER) && _MSC_VER <= 1800 // MSVC 2013
-		child(child&& c) noexcept
-			: flags_(c.flags_)
-			, border_size_(c.border_size_)
-			, widget_(std::move(c.widget_))
-		{
-		}
-#else
 		child(child&&) noexcept = default;
-#endif
 
 		/** Returns the best size for the cell. */
 		point get_best_size() const;

src/terrain/translation.hpp

@@ -79,15 +79,12 @@ namespace t_translation {
 
 		ter_map() = default;
 		ter_map(const ter_map&) = default;
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
 		ter_map(ter_map&&) = default;
-#endif
+
 		ter_map(int w, int h, terrain_code fill = terrain_code()) : data(w * h, fill), w(w), h(h) {}
 
 		ter_map & operator= (const ter_map &) = default;
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
 		ter_map & operator= (ter_map &&) = default;
-#endif
 
 		terrain_code& get(int x, int y) { std::size_t index = x * h + y; return data.at(index); }
 		const terrain_code& get(int x, int y) const { std::size_t index = x * h + y; return data.at(index); }

src/units/filter.hpp

@@ -101,27 +101,8 @@ public:
 	unit_filter(const unit_filter&) = default;
 	unit_filter& operator=(const unit_filter&) = default;
 
-#if defined(_MSC_VER) && _MSC_VER < 1900
-	unit_filter(unit_filter&& u)
-		: cfg_(std::move(u.cfg_))
-		, fc_(u.fc_)
-		, use_flat_tod_(u.use_flat_tod_)
-		, impl_(std::move(u.impl_))
-		, max_matches_(u.max_matches_)
-	{}
-	unit_filter& operator=(unit_filter&& u)
-	{
-		cfg_ = std::move(u.cfg_);
-		fc_ = u.fc_;
-		use_flat_tod_ = u.use_flat_tod_;
-		impl_ = std::move(u.impl_);
-		max_matches_ = u.max_matches_;
-		return *this;
-	}
-#else
 	unit_filter(unit_filter&&) = default;
 	unit_filter& operator=(unit_filter&&) = default;
-#endif
 
 	unit_filter& set_use_flat_tod(bool value) {
 		use_flat_tod_ = value;

src/wesnothd_connection.hpp

@@ -213,15 +213,7 @@ public:
 	wesnothd_connection_ptr(const wesnothd_connection_ptr&) = delete;
 	wesnothd_connection_ptr& operator=(const wesnothd_connection_ptr&) = delete;
 
-#if defined(_MSC_VER) && _MSC_VER == 1800
-	wesnothd_connection_ptr(wesnothd_connection_ptr&& other)
-		: ptr_(std::move(other.ptr_))
-	{
-	}
-
-#else
 	wesnothd_connection_ptr(wesnothd_connection_ptr&&) = default;
-#endif
 	wesnothd_connection_ptr& operator=(wesnothd_connection_ptr&&);
 
 	~wesnothd_connection_ptr();