Fix GH-12633: sqlite3_defensive.phpt fails with sqlite 3.44.0

Removes 'PRAGMA writable_schema;'.

From sqlite changelog https://www.sqlite.org/releaselog/3_44_0.html:
> The SQLITE_DBCONFIG_DEFENSIVE setting now prevents PRAGMA writable_schema
> from being turned on.
> Previously writable_schema could be turned on, but would not actually allow
> the schema to be writable. Now it simply cannot be turned on.

Closes GH-12636.

Author: SakiTakamachi

NEWS

@@ -8,6 +8,10 @@ PHP                                                                        NEWS
 - Standard:
   . Fix memory leak in syslog device handling. (danog)
 
+- SQLite3:
+  . Fixed bug GH-12633 (sqlite3_defensive.phpt fails with sqlite 3.44.0).
+    (SakiTakamachi)
+
 23 Nov 2023, PHP 8.1.26
 
 - Core:

ext/sqlite3/tests/sqlite3_defensive.phpt

@@ -20,7 +20,6 @@ var_dump($db->exec('CREATE TABLE test (a, b);'));
 
 // This does not generate an error!
 var_dump($db->exec('PRAGMA writable_schema = ON;'));
-var_dump($db->querySingle('PRAGMA writable_schema;'));
 
 // Should be 1
 var_dump($db->querySingle('SELECT COUNT(*) FROM sqlite_master;'));
@@ -35,8 +34,7 @@ var_dump($db->querySingle('SELECT COUNT(*) FROM sqlite_master;'));
 bool(true)
 bool(true)
 int(1)
-int(1)
 
 Warning: SQLite3::querySingle(): Unable to prepare statement: 1, table sqlite_master may not be modified in %s on line %d
 bool(false)
-int(1)
+int(1)