remove update_titan feature (#365)

Signed-off-by: Connor1996 <zbk602423539@gmail.com>

Cargo.toml

@@ -20,7 +20,6 @@ jemalloc = ["librocksdb_sys/jemalloc"]
 portable = ["librocksdb_sys/portable"]
 sse = ["librocksdb_sys/sse"]
 valgrind = []
-update_titan = ["librocksdb_sys/update_titan"]
 
 [dependencies]
 libc = "0.2.11"

librocksdb_sys/Cargo.toml

@@ -19,7 +19,6 @@ jemalloc = ["jemalloc-sys"]
 # when not using with static-link right now in this crate.
 portable = ["libtitan_sys/portable"]
 sse = ["libtitan_sys/sse"]
-update_titan = ["libtitan_sys/update_titan"]
 
 [build-dependencies]
 cc = "1.0.3"

librocksdb_sys/libtitan_sys/Cargo.toml

@@ -13,7 +13,6 @@ default = []
 # when not using with static-link right now in this crate.
 portable = []
 sse = []
-update_titan = []
 
 [build-dependencies]
 cc = "1.0.3"

librocksdb_sys/libtitan_sys/build.rs

@@ -2,7 +2,6 @@ extern crate cc;
 extern crate cmake;
 
 use std::env;
-use std::process::Command;
 
 fn main() {
     // RocksDB cmake script expect libz.a being under ${DEP_Z_ROOT}/lib, but libz-sys crate put it
@@ -23,13 +22,6 @@ fn main() {
     if cfg!(feature = "sse") {
         cfg.define("FORCE_SSE42", "ON");
     }
-    if cfg!(feature = "update_titan") {
-        Command::new("make")
-            .current_dir("../..")
-            .args(&["update_titan"])
-            .status()
-            .expect("failed to update titan!");
-    }
     let dst = cfg
         .define("ROCKSDB_DIR", cur_dir.join("..").join("rocksdb"))
         .define("WITH_TITAN_TESTS", "OFF")