Remove unnecessary dependencies in buffer and language crates

crates/buffer/Cargo.toml

@@ -4,30 +4,20 @@ version = "0.1.0"
 edition = "2018"
 
 [features]
-test-support = ["rand"]
+test-support = ["rand", "seahash"]
 
 [dependencies]
 clock = { path = "../clock" }
-gpui = { path = "../gpui" }
 rpc = { path = "../rpc" }
 sum_tree = { path = "../sum_tree" }
-theme = { path = "../theme" }
 anyhow = "1.0.38"
 arrayvec = "0.7.1"
-lazy_static = "1.4"
 log = "0.4"
-parking_lot = "0.11.1"
 rand = { version = "0.8.3", optional = true }
-seahash = "4.1"
-serde = { version = "1", features = ["derive"] }
-similar = "1.3"
+seahash = { version = "4.1", optional = true }
 smallvec = { version = "1.6", features = ["union"] }
-smol = "1.2"
-tree-sitter = "0.19.5"
 
 [dev-dependencies]
 gpui = { path = "../gpui", features = ["test-support"] }
-
+seahash = "4.1"
 rand = "0.8.3"
-tree-sitter-rust = "0.19.0"
-unindent = "0.1.7"