[sql] Remove fts2 patches.

third_party/sqlite/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 config("sqlite_config") {
   include_dirs = [ "." ]
 }
 
 source_set("sqlite") {
   sources = [
     "amalgamation/sqlite3.c",
     "amalgamation/sqlite3.h",
   ]
 
   cflags = []
   defines = [
-    "SQLITE_CORE",
     "SQLITE_ENABLE_FTS3",
     "SQLITE_DISABLE_FTS3_UNICODE",
     "SQLITE_DISABLE_FTS4_DEFERRED",
     "SQLITE_ENABLE_ICU",
     "SQLITE_ENABLE_MEMORY_MANAGEMENT",
     "SQLITE_SECURE_DELETE",
     "SQLITE_SEPARATE_CACHE_POOLS",
     "THREADSAFE",
     "_HAS_EXCEPTIONS=0",
   ]
@@ skipping 66 matching lines @@
 
     deps = [
       ":sqlite",
       "//third_party/icu",
     ]
   }
 }
 
 if (is_ios) {
   source_set("sqlite_regexp") {
+    defines += [
+      # Necessary to statically compile the extension.
+      "SQLITE_CORE",
+    ]
     sources = [
       "src/ext/icu/icu.c",
     ]
     deps = [
       "//third_party/icu",
     ]
   }
 }