Update NanoVNA_F.py

Remove 41 to 64 lines of code from the Nanovna-F file (this will cause the screen to be split into four blocks, each evenly distributed across the full screen??)

NanoVNASaver/Hardware/NanoVNA_F.py

@@ -38,33 +38,8 @@ class NanoVNA_F(NanoVNA):
             return QtGui.QPixmap()
         try:
             rgba_array = self._capture_data()
-            unwrapped_array = np.empty(
-                self.screenwidth*self.screenheight,
-                dtype=np.uint32)
-            for y in range(self.screenheight // 2):
-                for x in range(self.screenwidth // 2):
-                    unwrapped_array[
-                        2 * x + 2 * y * self.screenwidth
-                    ] = rgba_array[x + y * self.screenwidth]
-                    unwrapped_array[
-                        (2 * x) + 1 + 2 * y * self.screenwidth
-                    ] = rgba_array[
-                        x + (self.screenheight//2 + y) * self.screenwidth
-                    ]
-                    unwrapped_array[
-                        2 * x + (2 * y + 1) * self.screenwidth
-                    ] = rgba_array[
-                        x + self.screenwidth // 2 + y * self.screenwidth
-                    ]
-                    unwrapped_array[
-                        (2 * x) + 1 + (2 * y + 1) * self.screenwidth
-                    ] = rgba_array[
-                        x + self.screenwidth // 2 +
-                        (self.screenheight//2 + y) * self.screenwidth
-                    ]
-
             image = QtGui.QImage(
-                unwrapped_array,
+                rgba_array,
                 self.screenwidth, self.screenheight,
                 QtGui.QImage.Format_ARGB32)
             logger.debug("Captured screenshot")