reader: do not include unused headers

these unused includes were identified by clangd. see
https://clangd.llvm.org/guides/include-cleaner#unused-include-warning
for more details on the "Unused include" warning.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>

Closes scylladb/scylladb#17036

readers/flat_mutation_reader_v2.hh

@@ -11,12 +11,12 @@
 #include <seastar/util/bool_class.hh>
 #include <seastar/core/future.hh>
 #include <seastar/core/circular_buffer.hh>
+#include <seastar/core/thread.hh>
 
 #include "mutation/mutation_fragment_v2.hh"
 #include "mutation/mutation.hh"
 #include "mutation/mutation_consumer_concepts.hh"
 #include "reader_permit.hh"
-#include "utils/maybe_yield.hh"
 
 using seastar::future;
 

readers/from_mutations_v2.hh

@@ -10,7 +10,6 @@
 #include "schema/schema_fwd.hh"
 #include <vector>
 #include "dht/i_partitioner_fwd.hh"
-#include "mutation/mutation_fragment_fwd.hh"
 #include "readers/flat_mutation_reader_fwd.hh"
 #include "readers/flat_mutation_reader_v2.hh"
 

readers/generating_v2.hh

@@ -8,7 +8,6 @@
 
 #pragma once
 #include "schema/schema_fwd.hh"
-#include <functional>
 #include <seastar/core/future.hh>
 #include "mutation/mutation_fragment_fwd.hh"
 

readers/multishard.cc

@@ -18,7 +18,6 @@
 #include "readers/foreign.hh"
 #include "readers/multishard.hh"
 #include "readers/mutation_source.hh"
-#include "readers/queue.hh"
 #include "schema/schema_registry.hh"
 #include "locator/abstract_replication_strategy.hh"
 

row_cache.cc

@@ -11,13 +11,12 @@
 #include <seastar/core/do_with.hh>
 #include <seastar/core/future-util.hh>
 #include <seastar/core/metrics.hh>
+#include <seastar/core/thread.hh>
 #include <seastar/util/defer.hh>
 #include "replica/memtable.hh"
-#include <chrono>
 #include <boost/version.hpp>
 #include <sys/sdt.h>
 #include "read_context.hh"
-#include "replica/dirty_memory_manager.hh"
 #include "real_dirty_memory_accounter.hh"
 #include "readers/delegating_v2.hh"
 #include "readers/forwardable_v2.hh"