Revert "Add xmake"

.gitignore

@@ -34,5 +34,3 @@ main
 
 pypi/
 libpocketpy.dylib
-
-.xmake/

xmake.lua

@@ -1,49 +0,0 @@
-set_project("pocketpy")
-
-set_allowedplats("windows", "linux", "macosx", "wasm")
-
-option("dev", {default = false, showmenu = true, description = ""})
-
-add_requires("python", {kind = "binary"})
-
-add_rules("mode.debug", "mode.release")
-
-set_languages("c++17")
-
-add_cxflags("/utf-8", {tools = "cl"})
-
-add_includedirs("include")
-
-if is_plat("linux", "macosx") then
-    add_syslinks("dl")
-end
-
-target("pocketpy")
-    if has_config("dev") then
-        set_kind("shared")
-    else
-        set_kind("$(kind)")
-    end
-
-    add_files("src/*.cpp")
-    add_headerfiles("include/(**.h)")
-
-    if is_plat("windows") and is_kind("shared") then
-        add_rules("utils.symbols.export_all")
-    end
-
-    before_build(function (target)
-        local python = assert(import("lib.detect.find_tool")("python3"), "python3 not found!")
-        os.execv(python.program, {"prebuild.py"})
-    end)
-
-target("main")
-    set_kind("binary")
-    add_files("src2/main.cpp")
-    add_deps("pocketpy")
-
-    on_load(function (target)
-        if not has_config("dev") then
-            target:set("enabled", false)
-        end
-    end)