Remove deprecated table_cache_remove_scan_count_limit option. (#9450)

Summary:
In RocksDB, this option was already marked as "NOT SUPPORTED" for a long time, and setting this option does not have any effect on the behavior of RocksDB library. Therefore, we are removing it in the preparations of the upcoming 7.0 release.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9450

Reviewed By: ajkr

Differential Revision: D33802466

Pulled By: bjlemaire

fbshipit-source-id: 97570985f1400525304053476450f7ef504c0cd5

HISTORY.md

@@ -5,6 +5,7 @@
 * Remove librados support from main repo.
 * Remove deprecated API DB::AddFile from main repo.
 * Remove deprecated API ObjectLibrary::Register() and the (now obsolete) Regex public API. Use ObjectLibrary::AddFactory() with PatternEntry instead.
+* Remove deprecated option DBOption::table_cache_remove_scan_count_limit.
 
 ## 6.29.0 (01/21/2022)
 Note: The next release will be major release 7.0. See https://github.com/facebook/rocksdb/issues/9390 for more info.

db/c.cc

@@ -3338,11 +3338,6 @@ int rocksdb_options_get_table_cache_numshardbits(rocksdb_options_t* opt) {
   return opt->rep.table_cache_numshardbits;
 }
 
-void rocksdb_options_set_table_cache_remove_scan_count_limit(
-    rocksdb_options_t* /*opt*/, int /*v*/) {
-  // this option is deprecated
-}
-
 void rocksdb_options_set_arena_block_size(
     rocksdb_options_t* opt, size_t v) {
   opt->rep.arena_block_size = v;

include/rocksdb/c.h

@@ -1223,9 +1223,6 @@ extern ROCKSDB_LIBRARY_API void rocksdb_options_set_table_cache_numshardbits(
     rocksdb_options_t*, int);
 extern ROCKSDB_LIBRARY_API int rocksdb_options_get_table_cache_numshardbits(
     rocksdb_options_t*);
-extern ROCKSDB_LIBRARY_API void
-rocksdb_options_set_table_cache_remove_scan_count_limit(rocksdb_options_t*,
-                                                        int);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_arena_block_size(
     rocksdb_options_t*, size_t);
 extern ROCKSDB_LIBRARY_API size_t

include/rocksdb/options.h

@@ -748,9 +748,6 @@ struct DBOptions {
   // Number of shards used for table cache.
   int table_cache_numshardbits = 6;
 
-  // NOT SUPPORTED ANYMORE
-  // int table_cache_remove_scan_count_limit;
-
   // The following two fields affect how archived logs will be deleted.
   // 1. If both set to 0, logs will be deleted asap and will not get into
   //    the archive.