Remove RCtrl+Shift+v paste shortcut

Now that LCtrl+v synchronize the computer clipboard to the device
clipboard, RCtrl+Shift+v is not needed anymore.

Note: RCtrl+v is kept to send the computer clipboard content as a
sequence of keys.

app/src/cli.c

@@ -248,10 +248,6 @@ scrcpy_print_usage(const char *arg0) {
         "    RCtrl+v\n"
         "        Paste computer clipboard to device\n"
         "\n"
-        "    RCtrl+Shift+v\n"
-        "        Copy computer clipboard to device (and paste if the device\n"
-        "        runs Android >= 7)\n"
-        "\n"
         "    RCtrl+i\n"
         "        Enable/disable FPS counter (print frames/second in logs)\n"
         "\n"

app/src/input_manager.c

@@ -347,14 +347,9 @@ input_manager_process_key(struct input_manager *im,
                 }
                 return;
             case SDLK_v:
-                if (control && !repeat && down) {
-                    if (shift) {
-                        // store the text in the device clipboard and paste
-                        set_device_clipboard(controller, true);
-                    } else {
-                        // inject the text as input events
-                        clipboard_paste(controller);
-                    }
+                if (control && !shift && !repeat && down) {
+                    // Inject the text as input events
+                    clipboard_paste(controller);
                 }
                 return;
             case SDLK_f: