build: Remove mingw check for SetupDiGetDevicePropertyW

It was mssing when the check was added in 2016, but was fixed upstream
in https://github.com/mirror/mingw-w64/commit/9ef49367378c50553943bd
shortly after.

Assume everyone has updated by now.

See !861 for a related change on the master branch.

meson.build

@@ -778,19 +778,6 @@ if os_win32
     #include <windows.h>
   ''')
   cdata.set('SIZEOF_DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY', dvot_size)
-
-  getdevprop_code = '''
-    #define _WIN32_WINNT 0x0600
-    #include <windows.h>
-    #include <devpropdef.h>
-    #include <setupapi.h>
-
-    int main(int argc, char *argv[]) {
-      return SetupDiGetDevicePropertyW(NULL, NULL, NULL, NULL, NULL, 0, NULL, 0);
-    }
-  '''
-  result = cc.links(getdevprop_code, args: ['-lsetupapi'], name: 'has SetupDiGetDevicePropertyW')
-  cdata.set('HAVE_SETUP_DI_GET_DEVICE_PROPERTY_W', result ? 1 : false)
 endif
 
 have_gio_unix = false