diff --git a/internal/glfwwin/api_windows.go b/internal/glfwwin/api_windows.go
index cdac582be..0cd523bb8 100644
--- a/internal/glfwwin/api_windows.go
+++ b/internal/glfwwin/api_windows.go
@@ -727,10 +727,8 @@ var (
 
 	procChoosePixelFormat   = gdi32.NewProc("ChoosePixelFormat")
 	procCreateBitmap        = gdi32.NewProc("CreateBitmap")
-	procCreateDCW           = gdi32.NewProc("CreateDCW")
 	procCreateDIBSection    = gdi32.NewProc("CreateDIBSection")
 	procCreateRectRgn       = gdi32.NewProc("CreateRectRgn")
-	procDeleteDC            = gdi32.NewProc("DeleteDC")
 	procDeleteObject        = gdi32.NewProc("DeleteObject")
 	procDescribePixelFormat = gdi32.NewProc("DescribePixelFormat")
 	procGetDeviceCaps       = gdi32.NewProc("GetDeviceCaps")
@@ -945,44 +943,6 @@ func _CreateBitmap(nWidth int32, nHeight int32, nPlanes uint32, nBitCount uint32
 	return _HBITMAP(r), nil
 }
 
-func _CreateDCW(driver string, device string, port string, pdm *_DEVMODEW) (_HDC, error) {
-	var lpszDriver *uint16
-	if driver != "" {
-		var err error
-		lpszDriver, err = windows.UTF16PtrFromString(driver)
-		if err != nil {
-			panic("glfwwin: driver must not include a NUL character")
-		}
-	}
-
-	var lpszDevice *uint16
-	if device != "" {
-		var err error
-		lpszDevice, err = windows.UTF16PtrFromString(device)
-		if err != nil {
-			panic("glfwwin: device must not include a NUL character")
-		}
-	}
-
-	var lpszPort *uint16
-	if port != "" {
-		var err error
-		lpszPort, err = windows.UTF16PtrFromString(port)
-		if err != nil {
-			panic("glfwwin: port must not include a NUL character")
-		}
-	}
-
-	r, _, e := procCreateDCW.Call(uintptr(unsafe.Pointer(lpszDriver)), uintptr(unsafe.Pointer(lpszDevice)), uintptr(unsafe.Pointer(lpszPort)), uintptr(unsafe.Pointer(pdm)))
-	runtime.KeepAlive(lpszDriver)
-	runtime.KeepAlive(lpszDevice)
-	runtime.KeepAlive(lpszPort)
-	if _HDC(r) == 0 {
-		return 0, fmt.Errorf("glfwwin: CreateDCW failed: %w", e)
-	}
-	return _HDC(r), nil
-}
-
 func _CreateDIBSection(hdc _HDC, pbmi *_BITMAPV5HEADER, usage uint32, hSection windows.Handle, offset uint32) (_HBITMAP, *byte, error) {
 	// pbmi is originally *BITMAPINFO.
 	var bits *byte
@@ -1062,14 +1022,6 @@ func _DestroyWindow(hWnd windows.HWND) error {
 	return nil
 }
 
-func _DeleteDC(hdc _HDC) error {
-	r, _, e := procDeleteDC.Call(uintptr(hdc))
-	if int32(r) == 0 {
-		return fmt.Errorf("glfwwin: DeleteDC failed: %w", e)
-	}
-	return nil
-}
-
 func _DeleteObject(ho _HGDIOBJ) error {
 	r, _, e := procDeleteObject.Call(uintptr(ho))
 	if int32(r) == 0 {
diff --git a/internal/glfwwin/internal_windows.go b/internal/glfwwin/internal_windows.go
index 409cc0439..cc8d996cc 100644
--- a/internal/glfwwin/internal_windows.go
+++ b/internal/glfwwin/internal_windows.go
@@ -220,9 +220,6 @@ type Window struct {
 type Monitor struct {
 	name string
 
-	widthMM  int
-	heightMM int
-
 	window *Window
 
 	modes       []*VidMode
diff --git a/internal/glfwwin/monitor_windows.go b/internal/glfwwin/monitor_windows.go
index 3c482805d..144858cbc 100644
--- a/internal/glfwwin/monitor_windows.go
+++ b/internal/glfwwin/monitor_windows.go
@@ -240,12 +240,7 @@ func (m *Monitor) GetWorkarea() (xpos, ypos, width, height int, err error) {
 	return
 }
 
-func (m *Monitor) GetPhysicalSize() (widthMM, heightMM int, err error) {
-	if !_glfw.initialized {
-		return 0, 0, NotInitialized
-	}
-	return m.widthMM, m.heightMM, nil
-}
+// GetPhysicalSize is not implemented.
 
 func (m *Monitor) GetContentScale() (xscale, yscale float32, err error) {
 	if !_glfw.initialized {
diff --git a/internal/glfwwin/win32monitor_windows.go b/internal/glfwwin/win32monitor_windows.go
index e57629012..64b0f70f6 100644
--- a/internal/glfwwin/win32monitor_windows.go
+++ b/internal/glfwwin/win32monitor_windows.go
@@ -58,26 +58,8 @@ func createMonitor(adapter *_DISPLAY_DEVICEW, display *_DISPLAY_DEVICEW) (*Monit
 		return nil, nil
 	}
 
-	var widthMM, heightMM int
-	dc, err := _CreateDCW("DISPLAY", adapterDeviceName, "", nil)
-	if err != nil {
-		return nil, err
-	}
-	if _IsWindows8Point1OrGreater() {
-		widthMM = int(_GetDeviceCaps(dc, _HORZSIZE))
-		heightMM = int(_GetDeviceCaps(dc, _VERTSIZE))
-	} else {
-		widthMM = int(float64(dm.dmPelsWidth) * 25.4 / float64(_GetDeviceCaps(dc, _LOGPIXELSX)))
-		heightMM = int(float64(dm.dmPelsHeight) * 25.4 / float64(_GetDeviceCaps(dc, _LOGPIXELSY)))
-	}
-	if err := _DeleteDC(dc); err != nil {
-		return nil, err
-	}
-
 	monitor := &Monitor{
-		name:     name,
-		widthMM:  widthMM,
-		heightMM: heightMM,
+		name: name,
 	}
 
 	if adapter.StateFlags&_DISPLAY_DEVICE_MODESPRUNED != 0 {