cleanup duplicate serial docs

docs/how-to/connect-to-comma.md

@@ -7,7 +7,7 @@ A comma 3/3X is a normal [Linux](https://github.com/commaai/agnos-builder) compu
 On both the comma three and 3X, the serial console is accessible from the main OBD-C port.
 Connect the comma 3/3X to your computer with a normal USB C cable, or use a [comma serial](https://comma.ai/shop/comma-serial) for steady 12V power.
 
-On the comma three, the serial console is exposed through a UART-to-USB chip, and `tools/serial/connect.sh` can be used to connect.
+On the comma three, the serial console is exposed through a UART-to-USB chip, and `tools/scripts/serial.sh` can be used to connect.
 
 On the comma 3X, the serial console is accessible through the [panda](https://github.com/commaai/panda) using the `panda/tests/som_debug.sh` script.
 

tools/serial/README.md

@@ -1,21 +0,0 @@
-# comma serial
-
-The comma serial gets you access to a low level serial console on your comma three, while providing a stable 12V to power the device.
-
-The serial is available on the [comma shop](https://comma.ai/shop/products/comma-serial).
-
-## setup
-
-* Connect all three cables to the serial
-* Connect the USB A to your computer
-* Connect the USB-C to the OBD-C port on your comma three
-
-## usage
-
-```
-sudo screen /dev/ttyUSB0 115200
-```
-or use `connect.sh` to run the previous command in a loop.
-
-
-The username and password are both `comma`.