Revert "stalwart-mail: build against system jemalloc"

pkgs/by-name/st/stalwart-mail/package.nix

···
   sqlite,
   foundationdb,
   zstd,
-  rust-jemalloc-sys-unprefixed,
   stdenv,
   nix-update-script,
   nixosTests,
···
   stalwartEnterprise ? false,
 }:
 
-let
-  rocksdbJemalloc = rocksdb.override { enableJemalloc = true; };
-in
 rustPlatform.buildRustPackage (finalAttrs: {
   pname = "stalwart-mail" + (lib.optionalString stalwartEnterprise "-enterprise");
   version = "0.12.2";
···
     hash = "sha256-P19jeEzFE8Gu6hqHZJiPoJ70r+zOmzOpEwfFqPQczZY=";
   };
 
-  # rocksdb does not properly distinguish between pointers it has allocated itself
-  # and pointers which were passed in and might be registered with a different
-  # allocator, so we enable the unprefixed_malloc_on_supported_platforms to use
-  # jemalloc implicitly in the entire process.
-  postPatch = ''
-    for file in crates/main/Cargo.toml tests/Cargo.toml; do
-      substituteInPlace $file --replace-fail \
-        'jemallocator = "0.5.0"' 'jemallocator = { version = "0.5.0", features = ["unprefixed_malloc_on_supported_platforms"] }'
-    done
-  '';
-
   useFetchCargoVendor = true;
   cargoHash = "sha256-WVvDapCA9pTgOtPpbsK78u2AC2hUfo3sOejZ6pJSlQk=";
 
···
     openssl
     sqlite
     zstd
-    rust-jemalloc-sys-unprefixed
-    rocksdbJemalloc
   ] ++ lib.optionals (stdenv.hostPlatform.isLinux && withFoundationdb) [ foundationdb ];
 
   # Issue: https://github.com/stalwartlabs/stalwart/issues/1104
···
   env = {
     OPENSSL_NO_VENDOR = true;
     ZSTD_SYS_USE_PKG_CONFIG = true;
-    ROCKSDB_INCLUDE_DIR = "${rocksdbJemalloc}/include";
-    ROCKSDB_LIB_DIR = "${rocksdbJemalloc}/lib";
+    ROCKSDB_INCLUDE_DIR = "${rocksdb}/include";
+    ROCKSDB_LIB_DIR = "${rocksdb}/lib";
   };
 
   postInstall = ''
···
   __darwinAllowLocalNetworking = true;
 
   passthru = {
-    rocksdb = rocksdbJemalloc; # make used rocksdb version available (e.g., for backup scripts)
+    inherit rocksdb; # make used rocksdb version available (e.g., for backup scripts)
     webadmin = callPackage ./webadmin.nix { };
     updateScript = nix-update-script { };
     tests.stalwart-mail = nixosTests.stalwart-mail;