sync: remove DebugLock alias template

Use `UniqueLock` directly. Type deduction works just fine from the first
argument to the constructor of `UniqueLock`, so there is no need to
repeat

```cpp
UniqueLock<typename std::remove_reference<typename std::remove_pointer<decltype(cs)>::type>::type>
```

five times in the `LOCK` macros. Just `UniqueLock` suffices.

Author: vasild

src/sync.h

@@ -243,9 +243,6 @@ class SCOPED_LOCKABLE UniqueLock : public MutexType::UniqueLock
 
 #define REVERSE_LOCK(g) typename std::decay<decltype(g)>::type::reverse_lock UNIQUE_NAME(revlock)(g, #g, __FILE__, __LINE__)
 
-template<typename MutexArg>
-using DebugLock = UniqueLock<typename std::remove_reference<typename std::remove_pointer<MutexArg>::type>::type>;
-
 // When locking a Mutex, require negative capability to ensure the lock
 // is not already held
 inline Mutex& MaybeCheckNotHeld(Mutex& cs) EXCLUSIVE_LOCKS_REQUIRED(!cs) LOCK_RETURNED(cs) { return cs; }
@@ -258,12 +255,12 @@ inline MutexType& MaybeCheckNotHeld(MutexType& m) LOCKS_EXCLUDED(m) LOCK_RETURNE
 template <typename MutexType>
 inline MutexType* MaybeCheckNotHeld(MutexType* m) LOCKS_EXCLUDED(m) LOCK_RETURNED(m) { return m; }
 
-#define LOCK(cs) DebugLock<decltype(cs)> UNIQUE_NAME(criticalblock)(MaybeCheckNotHeld(cs), #cs, __FILE__, __LINE__)
+#define LOCK(cs) UniqueLock UNIQUE_NAME(criticalblock)(MaybeCheckNotHeld(cs), #cs, __FILE__, __LINE__)
 #define LOCK2(cs1, cs2)                                               \
-    DebugLock<decltype(cs1)> criticalblock1(MaybeCheckNotHeld(cs1), #cs1, __FILE__, __LINE__); \
-    DebugLock<decltype(cs2)> criticalblock2(MaybeCheckNotHeld(cs2), #cs2, __FILE__, __LINE__)
-#define TRY_LOCK(cs, name) DebugLock<decltype(cs)> name(MaybeCheckNotHeld(cs), #cs, __FILE__, __LINE__, true)
-#define WAIT_LOCK(cs, name) DebugLock<decltype(cs)> name(MaybeCheckNotHeld(cs), #cs, __FILE__, __LINE__)
+    UniqueLock criticalblock1(MaybeCheckNotHeld(cs1), #cs1, __FILE__, __LINE__); \
+    UniqueLock criticalblock2(MaybeCheckNotHeld(cs2), #cs2, __FILE__, __LINE__)
+#define TRY_LOCK(cs, name) UniqueLock name(MaybeCheckNotHeld(cs), #cs, __FILE__, __LINE__, true)
+#define WAIT_LOCK(cs, name) UniqueLock name(MaybeCheckNotHeld(cs), #cs, __FILE__, __LINE__)
 
 #define ENTER_CRITICAL_SECTION(cs)                            \
     {                                                         \