Remove excpetion message checking

Author: pmendelski

sql/src/main/java/com/coditory/sherlock/SqlDistributedLockConnector.java

@@ -114,9 +114,6 @@ private boolean insertLock(SqlConnection connection, LockRequest lockRequest, In
             setupOptionalTimestamp(statement, 4, expiresAt);
             return statement.executeUpdate() > 0;
         } catch (SQLException e) {
-            if (!e.getMessage().toLowerCase().contains("duplicate")) {
-                throw e;
-            }
             return false;
         }
     }