Refactor out translation.h

This is a prerequisite for introducing bilingual error messages.
Note: #includes are arranged by clang-format-diff.py script.

src/init.cpp

@@ -19,40 +19,42 @@
 #include <compat/sanity.h>
 #include <consensus/validation.h>
 #include <fs.h>
-#include <httpserver.h>
 #include <httprpc.h>
+#include <httpserver.h>
 #include <index/blockfilterindex.h>
-#include <interfaces/chain.h>
 #include <index/txindex.h>
+#include <interfaces/chain.h>
 #include <key.h>
-#include <validation.h>
 #include <miner.h>
-#include <netbase.h>
 #include <net.h>
 #include <net_processing.h>
+#include <netbase.h>
 #include <policy/feerate.h>
 #include <policy/fees.h>
 #include <policy/policy.h>
 #include <policy/settings.h>
-#include <rpc/server.h>
-#include <rpc/register.h>
 #include <rpc/blockchain.h>
+#include <rpc/register.h>
+#include <rpc/server.h>
 #include <rpc/util.h>
-#include <script/standard.h>
-#include <script/sigcache.h>
 #include <scheduler.h>
+#include <script/sigcache.h>
+#include <script/standard.h>
 #include <shutdown.h>
-#include <util/threadnames.h>
 #include <timedata.h>
+#include <torcontrol.h>
 #include <txdb.h>
 #include <txmempool.h>
-#include <torcontrol.h>
 #include <ui_interface.h>
-#include <util/system.h>
 #include <util/moneystr.h>
+#include <util/system.h>
+#include <util/threadnames.h>
+#include <util/translation.h>
 #include <util/validation.h>
+#include <validation.h>
 #include <validationinterface.h>
 #include <walletinitinterface.h>
+
 #include <stdint.h>
 #include <stdio.h>