v1.0 Errata: R5 Removal

## Background

The intention behind J5 was to have two input pins to support a 3-position switch using software-configurable pullups (B5 and B6). After initial investigation for _outputs_ (called L* in schematic), we determined that physical pin 7 was pulled HIGH on boot, and didn't want relays accidentally triggering before the Python code could start. The four pins we use that are pulled HIGH in default [device tree](https://www.raspberrypi.org/documentation/configuration/pin-configuration.md), we included a stronger pulldown resistor, regardless of whether they were intended for input or output.

## The problem

The stronger hardware pulldown in tag:v1.0 (R5, 1k) fights with the software pullup (guessing about 5.6k), resulting in a max 0.5V which is still considered LOW. Looking at the physical boards, this could have been a problem as early as tag:v0.3, but the pulldown was only 10k in my locally-built v0.3 and v0.4 boards.

## Resolution

Desolder R5