servo: Merge #10941 - Remove dead code left over from #10085 (from samlh:patch-2); r=mbrubeck

cc @pcwalton

Source-Repo: https://github.com/servo/servo
Source-Revision: b5a23a16be861a837f7079244ca901fd0d0bef04

servo/components/layout/block.rs

@@ -1518,8 +1518,6 @@ impl BlockFlow {
                     }
                 }
             }
-
-            flags.union_floated_descendants_flags(child_base.flags);
         }
 
         // FIXME(pcwalton): This should consider all float descendants, not just children.

servo/components/layout/flow.rs

@@ -676,12 +676,6 @@ bitflags! {
     }
 }
 
-// NB: If you update this field, you must update the the floated descendants flags.
-/// The bitmask of flags that represent the `has_left_floated_descendants` and
-/// `has_right_floated_descendants` fields.
-
-static HAS_FLOATED_DESCENDANTS_BITMASK: FlowFlags = FlowFlags { bits: 0b0000_0011 };
-
 /// The number of bits we must shift off to handle the text alignment field.
 ///
 /// NB: If you update this, update `TEXT_ALIGN` above.
@@ -699,11 +693,6 @@ impl FlowFlags {
                 FlowFlags::from_bits(value.to_u32() << TEXT_ALIGN_SHIFT).unwrap();
     }
 
-    #[inline]
-    pub fn union_floated_descendants_flags(&mut self, other: FlowFlags) {
-        self.insert(other & HAS_FLOATED_DESCENDANTS_BITMASK);
-    }
-
     #[inline]
     pub fn float_kind(&self) -> float::T {
         if self.contains(FLOATS_LEFT) {