chore: drop windows-specific code

cmake/QEmbyPlatformDeps.cmake

@@ -17,13 +17,6 @@ function(qemby_append_default_qt_prefixes)
         )
     endif()
 
-    if(WIN32)
-        list(APPEND _qemby_qt_prefixes
-            "E:/Qt6/6.9.2/msvc2022_64"
-            "E:/Qt6/6.9.2/msvc2022_64/lib/cmake"
-        )
-    endif()
-
     foreach(_qemby_qt_prefix IN LISTS _qemby_qt_prefixes)
         if(EXISTS "${_qemby_qt_prefix}")
             list(APPEND CMAKE_PREFIX_PATH "${_qemby_qt_prefix}")
@@ -42,26 +35,6 @@ function(qemby_link_libmpv target)
         message(FATAL_ERROR "qemby_link_libmpv: target '${target}' does not exist")
     endif()
 
-    if(WIN32)
-        set(_qemby_mpv_root "${CMAKE_SOURCE_DIR}/libs/libmpv")
-        set(_qemby_mpv_include_dir "${_qemby_mpv_root}/include")
-
-        find_library(MPV_LIBRARY
-            NAMES mpv libmpv mpv-2 libmpv-2
-            PATHS "${_qemby_mpv_root}/lib"
-            NO_DEFAULT_PATH
-        )
-
-        if(NOT MPV_LIBRARY OR NOT EXISTS "${_qemby_mpv_include_dir}/mpv/client.h")
-            message(FATAL_ERROR
-                "Could not find bundled libmpv. Place the libmpv SDK under libs/libmpv.")
-        endif()
-
-        target_include_directories("${target}" PRIVATE "${_qemby_mpv_include_dir}")
-        target_link_libraries("${target}" PRIVATE "${MPV_LIBRARY}")
-        return()
-    endif()
-
     find_package(PkgConfig REQUIRED)
     pkg_check_modules(MPV REQUIRED IMPORTED_TARGET mpv)
     target_link_libraries("${target}" PRIVATE PkgConfig::MPV)