remove jemalloc usage

Author: git001

src/main.rs

@@ -1,10 +1,3 @@
-#[cfg(not(target_env = "msvc"))]
-use tikv_jemallocator::Jemalloc;
-
-#[cfg(not(target_env = "msvc"))]
-#[global_allocator]
-static GLOBAL: Jemalloc = Jemalloc;
-
 mod config;
 mod servers;
 mod upstreams;