1.Remove sdl2 from thirdparty since it is already required by imgui; 2.Update imgui to v1.90.6; 3.Update spdlog to v 1.14.1

thirdparty/sdl2/xmake.lua

@@ -1,10 +0,0 @@
-package("sdl2")
-    add_urls("https://github.com/libsdl-org/SDL/archive/refs/tags/release-2.28.3.tar.gz", {alias = "github"})
-    add_versions("github:2.28.3", "c17455d6e0c484bfe634b8de6af4c608e86ee449c28e40af04064aa6643fe382")
-
-    on_install(function (package)
-        local configs = {}
-        table.insert(configs, "-DSDL_SHARED_ENABLED_BY_DEFAULT=OFF -DSDL_TEST_ENABLED_BY_DEFAULT=OFF")
-        import("package.tools.cmake").install(package, configs)
-    end)
-package_end()

thirdparty/xmake.lua

@@ -1,4 +1,4 @@
-includes("sdl2", "projectx")
+includes("projectx")
 if is_plat("windows") then
 elseif is_plat("linux") then
     includes("ffmpeg")

xmake.lua

@@ -13,9 +13,8 @@ if is_mode("debug") then
     add_defines("REMOTE_DESK_DEBUG")
 end
 
-add_requires("sdl2 2.28.3", {system = false})
-add_requires("spdlog 1.11.0", {system = false})
-add_requires("imgui 1.89.9", {configs = {sdl2 = true, sdl2_renderer = true}})
+add_requires("spdlog 1.14.1", {system = false})
+add_requires("imgui 1.90.6", {configs = {sdl2 = true, sdl2_renderer = true}})
 add_requires("libyuv")
 
 if is_os("windows") then
@@ -41,7 +40,7 @@ elseif is_os("macosx") then
     add_frameworks("OpenGL")
 end
 
-add_packages("spdlog", "sdl2", "imgui")
+add_packages("spdlog", "imgui")
 
 includes("thirdparty")