fix clang-tidy issues

src/test/app/Sponsor_test.cpp

@@ -6538,7 +6538,7 @@ public:
         env(pay(gw, alice, usd(500)));
         env.close();
 
-        AMM amm(env, alice, XRP(100), usd(100));
+        AMM const amm(env, alice, XRP(100), usd(100));
 
         // rogue is never funded; it only supplies a real signing keypair.
         Account const rogue("rogue");

src/test/app/TxQ_test.cpp

@@ -5,7 +5,6 @@
 #include <test/jtx/WSClient.h>
 #include <test/jtx/amount.h>
 #include <test/jtx/balance.h>
-#include <test/jtx/check.h>
 #include <test/jtx/delegate.h>
 #include <test/jtx/envconfig.h>
 #include <test/jtx/fee.h>