Revert "Implement CIText as NOCASE alternative in postgresql"

This reverts commit 0f3c1b9d15.

optional/postgresql/Dockerfile

@@ -7,7 +7,7 @@ RUN apk add --no-cache \
 RUN pip3 install jinja2
 # Image specific layers under this line
 RUN apk add --no-cache \
-    postgresql postgresql-libs postgresql-contrib busybox-suid sudo tar \
+    postgresql postgresql-libs busybox-suid sudo tar \
   && apk add --virtual .build-deps gcc musl-dev postgresql-dev python3-dev \
   && pip3 install psycopg2 anosql \
   && apk --purge del .build-deps

optional/postgresql/conf/queries.sql

@@ -40,10 +40,3 @@ select 1
 create
     database mailu
     owner mailu;
-
--- name: create_citext!
--- Install the CIText extension
-create
-    extension
-    if not exists
-    citext;

optional/postgresql/start.py

@@ -8,7 +8,7 @@ import os
 import subprocess
 
 def setup():
-    conn =  psycopg2.connect(user = 'postgres')
+    conn =  psycopg2.connect('user=postgres')
     queries = anosql.load_queries('postgres', '/conf/queries.sql')
     # Mailu user
     queries.create_mailu_user(conn)
@@ -23,10 +23,6 @@ def setup():
         queries.create_db(conn)
         conn.set_isolation_level(1)
     conn.close()
-    conn = psycopg2.connect(user = 'postgres', database= 'mailu')
-    queries.create_citext(conn)
-    conn.commit()
-    conn.close()
 
 # Check if /data is empty
 if not os.listdir("/data"):