Remove unused translations

```
F:\Workspaces\riot-web\riot-web>yarn prunei18n
yarn run v1.19.1
$ matrix-prune-i18n
ar.json: removed 20 translations
az.json: removed 1 translations
bg.json: removed 29 translations
bn_IN.json: removed 1 translations
ca.json: removed 28 translations
cs.json: removed 28 translations
da.json: removed 27 translations
de_DE.json: removed 29 translations
el.json: removed 27 translations
en_US.json: removed 28 translations
eo.json: removed 28 translations
es.json: removed 28 translations
eu.json: removed 28 translations
fa.json: removed 26 translations
fi.json: removed 27 translations
fr.json: removed 29 translations
ga.json: removed 3 translations
gl.json: removed 28 translations
he.json: removed 26 translations
hi.json: removed 28 translations
hr.json: removed 27 translations
hu.json: removed 29 translations
id.json: removed 27 translations
is.json: removed 27 translations
it.json: removed 29 translations
ja.json: removed 27 translations
jbo.json: removed 27 translations
ka.json: removed 27 translations
ko.json: removed 28 translations
lt.json: removed 27 translations
lv.json: removed 28 translations
ml.json: removed 25 translations
nb_NO.json: removed 16 translations
nl.json: removed 29 translations
nn.json: removed 28 translations
pl.json: removed 28 translations
pt.json: removed 27 translations
pt_BR.json: removed 28 translations
ro.json: removed 28 translations
ru.json: removed 29 translations
sk.json: removed 28 translations
sl.json: removed 3 translations
sq.json: removed 29 translations
sr.json: removed 28 translations
sr_Latn.json: removed 1 translations
sv.json: removed 28 translations
ta.json: removed 7 translations
te.json: removed 2 translations
th.json: removed 25 translations
tr.json: removed 28 translations
uk.json: removed 28 translations
vi.json: removed 9 translations
vls.json: removed 2 translations
zh_Hans.json: removed 28 translations
zh_Hant.json: removed 29 translations
Done in 0.19s.
```

Fixes https://github.com/vector-im/riot-web/issues/11539

src/i18n/strings/lt.json

@@ -3,39 +3,12 @@
     "powered by Matrix": "veikia su Matrix",
     "Welcome to Riot.im": "Sveiki atvykę į Riot.im",
     "Chat with Riot Bot": "Kalbėtis su Riot botu",
-    "General discussion about Matrix and Riot": "Bendros diskusijos apie Matrix ir Riot",
-    "Matrix technical discussions": "Matrix techninės diskusijos",
-    "Riot is not supported on mobile web. Install the app?": "Riot nėra palaikoma naršant svetainėje mobiliaisiais įrenginiais. Įdiegti programėlę?",
     "Riot Desktop on %(platformName)s": "Riot Desktop, naudojant %(platformName)s",
     "%(appName)s via %(browserName)s on %(osName)s": "%(appName)s per %(browserName)s, naudojant %(osName)s",
     "You need to be using HTTPS to place a screen-sharing call.": "Norint skambinti naudojant ekrano vaizdo dalijimosi funkciją, jūs turite naudoti HTTPS.",
     "Custom Server Options": "Pasirinktiniai Serverio Nustatymai",
-    "You can use the custom server options to sign into other Matrix servers by specifying a different Home server URL.<br/>This allows you to use Riot with an existing Matrix account on a different home server.<br/><br/>You can also set a custom identity server but you won't be able to invite users by email address, or be invited by email address yourself.": "Norėdami prisijungti prie kito nei Matrix serverio, galite naudoti tinkinto serverio parametrus ir nurodyti kito serverio URL adresą.<br/>Tai leis jums naudoti Riot su esama Matrix paskyra kituose serveriuose.<br/><br/>Taip pat galite nustatyti tinkintą tapatybės serverį, tačiau tuomet negalėsite pakviesti kitus naudotojus pagal el. paštą, o taip pat ir jie negalės pakviesti jūsų.",
     "Dismiss": "Atmesti",
     "Decentralised, encrypted chat &amp; collaboration powered by [matrix]": "Decentralizuoti, šifruoti pokalbiai ir bendradarbiavimas, veikiantis su [matrix]",
-    "Search the room directory": "Ieškoti kambarių kataloge",
-    "Lots of rooms already exist in Matrix, linked to existing networks (Slack, IRC, Gitter etc) or independent. Check out the directory!": "Daugybė kambarių jau yra Matrix, susieti prie esamų tinklų (Slack, IRC, Gitter ir t.t.) arba nepriklausomi. Pasižvalgykite kataloge!",
-    "Get started with some tips from Riot Bot!": "Pradėkite darbo pradžią nuo Riot roboto patarimų!",
-    "Discussion of all things Matrix!": "Diskusijos apie viską, kas susiję su Matrix!",
-    "Riot/Web &amp; Desktop chat": "Pokalbiai apie Riot/Web ir Desktop",
-    "Riot/iOS &amp; matrix-ios-sdk chat": "Pokalbiai apie Riot/iOS ir matrix-ios-sdk",
-    "Riot/Android &amp; matrix-android-sdk chat": "Pokalbiai apie Riot/Android ir matrix-android-sdk",
-    "Running Matrix services": "Matrix paslaugų paleidimas",
-    "Community-run support for Synapse": "Su Synapse susijęs bendruomenės palaikymas",
-    "Admin support for Dendrite": "Dendrite administratorių palaikymas",
-    "Announcements about Synapse releases": "Skelbimai apie Synapse laidas",
-    "Support for those using and running matrix-appservice-irc": "Palaikymas skirtas besinaudojantiems ir prižiūrintiems matrix-appservice-irc",
-    "Building services on Matrix": "Paslaugų kūrimas, naudojant Matrix",
-    "Support for those using the Matrix spec": "Palaikymas skirtas besinaudojantiems Matrix specifikacija",
-    "Design and implementation of E2E in Matrix": "E2E dizainas ir įgyvendinimas ties Matrix",
-    "Implementing VR services with Matrix": "VR paslaugų įgyvendinimas ties Matrix",
-    "Implementing VoIP services with Matrix": "VoIP paslaugų įgyvendinimas ties Matrix",
-    "Discussion of the Identity Service API": "Diskusijos apie tapatybės paslaugos API",
-    "Support for those using, running and writing other bridges": "Palaikymas skirtas besinaudojantiems, prižiūrintiems ar kuriantiems kitus tinklų tiltus",
-    "Contributing code to Matrix and Riot": "Matrix ir Riot kodo plėtojimas",
-    "Dev chat for the Riot/Web dev team": "Kūrėjų pokalbiai, skirti Riot/Web kūrėjų komandai",
-    "Dev chat for the Dendrite dev team": "Kūrėjų pokalbiai, skirti Dendrite kūrėjų komandai",
-    "Co-ordination for Riot translators": "Koordinavimas Riot vertėjams",
     "Sign In": "Prisijungti",
     "Create Account": "Sukurti paskyrą",
     "Need help?": "Reikia pagalbos?",