Delete Remote Compaction Code (#280)

Summary:
There is now an upstream implementation of remote compaction, so we
don't need our own anymore:
https://github.com/facebook/rocksdb/wiki/Remote-Compaction-(Experimental)

Test Plan:
Buildkite

Reviewers:

Makefile

@@ -1886,9 +1886,6 @@ ldb_cmd_test: $(OBJ_DIR)/tools/ldb_cmd_test.o $(TOOLS_LIBRARY) $(TEST_LIBRARY) $
 ldb: $(OBJ_DIR)/tools/ldb.o $(TOOLS_LIBRARY) $(LIBRARY)
 	$(AM_LINK)
 
-remote_compaction_test: cloud/remote_compaction_test.o $(TEST_LIBRARY) $(LIBRARY)
-	$(AM_LINK)
-
 db_cloud_test: cloud/db_cloud_test.o $(TEST_LIBRARY) $(LIBRARY)
 	$(AM_LINK)
 

cloud/db_cloud_impl.cc

@@ -448,28 +448,6 @@ Status DBCloudImpl::DoCheckpointToCloud(
   return st;
 }
 
-Status DBCloudImpl::ExecuteRemoteCompactionRequest(
-    const PluggableCompactionParam& inputParams,
-    PluggableCompactionResult* result, bool doSanitize) {
-  auto* cfs =
-      dynamic_cast<CloudFileSystemImpl*>(GetEnv()->GetFileSystem().get());
-  assert(cfs);
-
-  // run the compaction request on the underlying local database
-  Status status = GetBaseDB()->ExecuteRemoteCompactionRequest(
-      inputParams, result, doSanitize);
-  if (!status.ok()) {
-    return status;
-  }
-
-  // convert the local pathnames to the cloud pathnames
-  for (unsigned int i = 0; i < result->output_files.size(); i++) {
-    OutputFile* outfile = &result->output_files[i];
-    outfile->pathname = cfs->RemapFilename(outfile->pathname);
-  }
-  return Status::OK();
-}
-
 Status DBCloud::ListColumnFamilies(const DBOptions& db_options,
                                    const std::string& name,
                                    std::vector<std::string>* column_families) {

cloud/db_cloud_impl.h

@@ -29,10 +29,6 @@ class DBCloudImpl : public DBCloud {
   Status CheckpointToCloud(const BucketOptions& destination,
                            const CheckpointToCloudOptions& options) override;
 
-  Status ExecuteRemoteCompactionRequest(
-      const PluggableCompactionParam& inputParams,
-      PluggableCompactionResult* result, bool sanitize) override;
-
  protected:
   // The CloudFileSystem used by this open instance.
   CloudFileSystem* cfs_;