refactor(ext/pgsql): Remove unnecessary error handling (GH-3973)

Author: KentarouTakeda

reference/pgsql/functions/pg-fetch-result.xml

@@ -110,7 +110,7 @@
     <programlisting role="php">
 <![CDATA[
 <?php
-$db = pg_connect("dbname=users user=me") || die();
+$db = pg_connect("dbname=users user=me");
 
 $res = pg_query($db, "SELECT 1 UNION ALL SELECT 2");
 

reference/pgsql/functions/pg-free-result.xml

@@ -75,7 +75,7 @@
     <programlisting role="php">
 <![CDATA[
 <?php
-$db = pg_connect("dbname=users user=me") || die();
+$db = pg_connect("dbname=users user=me");
 
 $res = pg_query($db, "SELECT 1 UNION ALL SELECT 2");