remove prom-process

Signed-off-by: Ping Yu <yuping@pingcap.com>

Author: pingyu

Cargo.toml

@@ -9,7 +9,7 @@ description = "The Rust language implementation of TiKV client."
 edition = "2018"
 
 [features]
-default = [ "protobuf-codec" ]
+default = [ "protobuf-codec", "prometheus/process" ]
 # Enable integration tests with a running TiKV and PD instance.
 # Use $PD_ADDRS, comma separated, to set the addresses the tests use.
 integration-tests = []
@@ -43,7 +43,7 @@ futures-timer = "3.0"
 grpcio = { version = "0.10", features = [ "openssl-vendored" ], default-features = false }
 lazy_static = "1"
 log = "0.4"
-prometheus = { version = "0.13", features = [ "push", "process" ], default-features = false }
+prometheus = { version = "0.13", features = [ "push" ], default-features = false }
 rand = "0.8"
 regex = "1"
 semver = "1.0"