clean up

src/Core/SortDescription.cpp

@@ -3,7 +3,6 @@
 #include <IO/Operators.h>
 #include <Common/JSONBuilder.h>
 #include <Common/SipHash.h>
-#include <Common/logger_useful.h>
 #if USE_EMBEDDED_COMPILER
 #include <DataTypes/Native.h>
 #include <Interpreters/JIT/compileFunction.h>

src/Core/SortDescription.h

@@ -10,8 +10,6 @@
 #include <DataTypes/IDataType.h>
 #include <Columns/Collator.h>
 
-class Collator;
-
 namespace DB
 {
 

src/Processors/QueryPlan/ReadFromMergeTree.cpp

@@ -135,7 +135,6 @@ ReadFromMergeTree::ReadFromMergeTree(
             if (std::find_if(header.begin(), header.end(), [&](ColumnWithTypeAndName const & col) { return col.name == column_name; })
                 == header.end())
                 break;
-            // fixme: there is no information about NULLS direction
             sort_description.emplace_back(column_name, sort_direction);
         }
         output_stream->sort_description = std::move(sort_description);