logging: remove unused BCLog::UTIL

Suggested by: David Gumberg (https://github.com/bitcoin/bitcoin/pull/29415#discussion_r1485310634)

src/logging.cpp

@@ -171,7 +171,6 @@ static const std::map<std::string, BCLog::LogFlags> LOG_CATEGORIES_BY_STR{
 #ifdef DEBUG_LOCKCONTENTION
     {"lock", BCLog::LOCK},
 #endif
-    {"util", BCLog::UTIL},
     {"blockstorage", BCLog::BLOCKSTORAGE},
     {"txreconciliation", BCLog::TXRECONCILIATION},
     {"scan", BCLog::SCAN},

src/logging.h

@@ -65,11 +65,10 @@ namespace BCLog {
 #ifdef DEBUG_LOCKCONTENTION
         LOCK        = (1 << 24),
 #endif
-        UTIL        = (1 << 25),
-        BLOCKSTORAGE = (1 << 26),
-        TXRECONCILIATION = (1 << 27),
-        SCAN        = (1 << 28),
-        TXPACKAGES  = (1 << 29),
+        BLOCKSTORAGE = (1 << 25),
+        TXRECONCILIATION = (1 << 26),
+        SCAN        = (1 << 27),
+        TXPACKAGES  = (1 << 28),
         ALL         = ~(uint32_t)0,
     };
     enum class Level {