Update translation files (#3887)

Co-authored-by: ButterflyOfFire <boffire@users.noreply.hosted.weblate.org>
Co-authored-by: Dan <denqwerta@gmail.com>
Co-authored-by: Felipe Nogueira <contato.fnog@gmail.com>
Co-authored-by: J. Lavoie <j.lavoie@net-c.ca>
Co-authored-by: Luna Jernberg <droidbittin@gmail.com>
Co-authored-by: Massimo Pissarello <mapi68@gmail.com>
Co-authored-by: Milo Ivir <mail@milotype.de>
Co-authored-by: Ondřej Mach <machondra2003@gmail.com>
Co-authored-by: Oğuz Ersen <oguz@ersen.moe>
Co-authored-by: Simona Iacob <s@zp1.net>
Co-authored-by: Yaron Shahrabani <sh.yaron@gmail.com>
Co-authored-by: gallegonovato <fran-carro@hotmail.es>
Co-authored-by: i3sey <deniskedrovsky@mail.ru>
Co-authored-by: tygyh <jonis9898@hotmail.com>
Co-authored-by: yangyangdaji <1504305527@qq.com>

translations/system-configuration.es.xlf

@@ -190,10 +190,6 @@
         <source>theme.avatar_url</source>
         <target state="translated">Permitir el uso de URLs para las imágenes de los avatares</target>
       </trans-unit>
-      <trans-unit id="4bkIcyi" resname="theme.random_colors">
-        <source>theme.random_colors</source>
-        <target state="translated">Usar colores aleatorios para objetos sin color asignado</target>
-      </trans-unit>
       <trans-unit id="tuPXa0S" resname="lockdown_period">
         <source>lockdown_period</source>
         <target state="translated">Periodo de bloqueo</target>
@@ -282,10 +278,6 @@
         <source>company.financial_year</source>
         <target state="translated">Año fiscal</target>
       </trans-unit>
-      <trans-unit id="1isLKYz" resname="theme.colors_limited">
-        <source>theme.colors_limited</source>
-        <target state="translated">Limite de las opciones de color</target>
-      </trans-unit>
       <trans-unit id="BGHQ8YO" resname="user_auth_login">
         <source>user_auth_login</source>
         <target state="translated">Formulario de inscripción</target>