Remove primary color from timer progress

Some of these colors provide terrible contrast
so we should just leave it as default. Otherwise
people using certain colors (like light cyan)
can barely see this progress circle at all.

TimerPage.tsx

@@ -7,7 +7,6 @@ import {settingsRepo} from './db'
 import DrawerHeader from './DrawerHeader'
 import MassiveFab from './MassiveFab'
 import Settings from './settings'
-import {useTheme} from './use-theme'
 
 interface TickEvent {
   minutes: string
@@ -18,7 +17,6 @@ export default function TimerPage() {
   const [minutes, setMinutes] = useState('00')
   const [seconds, setSeconds] = useState('00')
   const [settings, setSettings] = useState<Settings>()
-  const {color} = useTheme()
 
   useEffect(() => {
     settingsRepo.findOne({where: {}}).then(setSettings)
@@ -66,7 +64,6 @@ export default function TimerPage() {
           <ProgressCircle
             style={{height: 300, width: 500, marginBottom: MARGIN, top: -50}}
             progress={progress}
-            progressColor={color}
             strokeWidth={10}
           />
         </View>