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diff --git a/src/core/lib/statistics/census_interface.h b/src/core/lib/statistics/census_interface.h
deleted file mode 100644
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--- a/src/core/lib/statistics/census_interface.h
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-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#ifndef GRPC_CORE_LIB_STATISTICS_CENSUS_INTERFACE_H
-#define GRPC_CORE_LIB_STATISTICS_CENSUS_INTERFACE_H
-
-#include <grpc/support/port_platform.h>
-
-/* Maximum length of an individual census trace annotation. */
-#define CENSUS_MAX_ANNOTATION_LENGTH 200
-
-/* Structure of a census op id. Define as structure because 64bit integer is not
-   available on every platform for C89. */
-typedef struct census_op_id {
-  uint32_t upper;
-  uint32_t lower;
-} census_op_id;
-
-typedef struct census_rpc_stats census_rpc_stats;
-
-/* Initializes Census library. No-op if Census is already initialized. */
-void census_init(void);
-
-/* Shutdown Census Library. */
-void census_shutdown(void);
-
-/* Annotates grpc method name on a census_op_id. The method name has the format
-   of <full quantified rpc service name>/<rpc function name>. Returns 0 iff
-   op_id and method_name are all valid. op_id is valid after its creation and
-   before calling census_tracing_end_op().
-
-   TODO(hongyu): Figure out valid characters set for service name and command
-   name and document requirements here.*/
-int census_add_method_tag(census_op_id op_id, const char *method_name);
-
-/* Annotates tracing information to a specific op_id.
-   Up to CENSUS_MAX_ANNOTATION_LENGTH bytes are recorded. */
-void census_tracing_print(census_op_id op_id, const char *annotation);
-
-/* Starts tracing for an RPC. Returns a locally unique census_op_id */
-census_op_id census_tracing_start_op(void);
-
-/* Ends tracing. Calling this function will invalidate the input op_id. */
-void census_tracing_end_op(census_op_id op_id);
-
-#endif /* GRPC_CORE_LIB_STATISTICS_CENSUS_INTERFACE_H */