search: Remove now unnecessary tsearch_extra dependency.

Now that we're implemented tsearch_extras in pure postgres, we no
longer need a custom extension.  This should help us considerably, as
it means we no longer need to ship custom apt packages at all.

Fixes #467.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

scripts/lib/build-tsearch-extras

@@ -1,14 +0,0 @@
-#!/usr/bin/env bash
-set -x
-set -e
-
-cd "$(mktemp -d)"
-distro=$(lsb_release -is)
-
-git clone https://github.com/zulip/tsearch_extras
-if [ "$distro" = "Ubuntu" ] || [ "$distro" == "Debian" ]; then
-    make="make"
-else
-    make="gmake"
-fi
-(cd tsearch_extras && "$make" && "$make" install)

scripts/setup/create-db.sql

@@ -3,4 +3,3 @@ ALTER ROLE zulip SET search_path TO zulip,public;
 CREATE DATABASE zulip OWNER=zulip;
 \connect zulip
 CREATE SCHEMA zulip AUTHORIZATION zulip;
-CREATE EXTENSION tsearch_extras SCHEMA zulip;