Clean up unused dependencies / features and centralize more feature selection into root Cargo.toml (#37720)

- Make feature flag of smallvec global.
- Removed unused dependency of thinvec.
- Removed unused flag of hyper-util.

Reduces the binary size by an astonishing 3.352k.

Testing: Compilation 'tests' this change.

Signed-off-by: Narfinger <Narfinger@users.noreply.github.com>

components/fonts/Cargo.toml

@@ -45,7 +45,7 @@ serde = { workspace = true }
 servo_arc = { workspace = true }
 servo_config = { path = "../config" }
 servo_url = { path = "../url" }
-smallvec = { workspace = true, features = ["union"] }
+smallvec = { workspace = true }
 stylo = { workspace = true }
 stylo_atoms = { workspace = true }
 tracing = { workspace = true, optional = true }

components/malloc_size_of/Cargo.toml

@@ -32,7 +32,6 @@ stylo = { workspace = true }
 stylo_dom = { workspace = true }
 stylo_malloc_size_of = { workspace = true }
 taffy = { workspace = true }
-thin-vec = { workspace = true }
 tokio = { workspace = true, features = ["sync"] }
 unicode-bidi = { workspace = true }
 unicode-script = { workspace = true }

components/malloc_size_of/lib.rs

@@ -352,31 +352,6 @@ where
     }
 }
 
-impl<T> MallocShallowSizeOf for thin_vec::ThinVec<T> {
-    fn shallow_size_of(&self, ops: &mut MallocSizeOfOps) -> usize {
-        if self.capacity() == 0 {
-            // If it's the singleton we might not be a heap pointer.
-            return 0;
-        }
-
-        assert_eq!(
-            std::mem::size_of::<Self>(),
-            std::mem::size_of::<*const ()>()
-        );
-        unsafe { ops.malloc_size_of(*(self as *const Self as *const *const ())) }
-    }
-}
-
-impl<T: MallocSizeOf> MallocSizeOf for thin_vec::ThinVec<T> {
-    fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize {
-        let mut n = self.shallow_size_of(ops);
-        for elem in self.iter() {
-            n += elem.size_of(ops);
-        }
-        n
-    }
-}
-
 impl<T: MallocSizeOf> MallocSizeOf for BinaryHeap<T> {
     fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize {
         self.iter().map(|element| element.size_of(ops)).sum()

components/script/Cargo.toml

@@ -114,7 +114,7 @@ servo_config = { path = "../config" }
 servo_geometry = { path = "../geometry" }
 servo_rand = { path = "../rand" }
 servo_url = { path = "../url" }
-smallvec = { workspace = true, features = ["union"] }
+smallvec = { workspace = true }
 strum = { workspace = true }
 strum_macros = { workspace = true }
 stylo = { workspace = true }