follow up #44404, remove duplicated tmeet definition (#44617)

Author: aviatesk

base/compiler/typelattice.jl

@@ -469,45 +469,3 @@ function stupdate1!(state::VarTable, change::StateUpdate)
     end
     return false
 end
-
-# compute typeintersect over the extended inference lattice,
-# as precisely as we can,
-# where v is in the extended lattice, and t is a Type.
-function tmeet(@nospecialize(v), @nospecialize(t))
-    if isa(v, Const)
-        if !has_free_typevars(t) && !isa(v.val, t)
-            return Bottom
-        end
-        return v
-    elseif isa(v, PartialStruct)
-        has_free_typevars(t) && return v
-        widev = widenconst(v)
-        if widev <: t
-            return v
-        end
-        ti = typeintersect(widev, t)
-        valid_as_lattice(ti) || return Bottom
-        @assert widev <: Tuple
-        new_fields = Vector{Any}(undef, length(v.fields))
-        for i = 1:length(new_fields)
-            vfi = v.fields[i]
-            if isvarargtype(vfi)
-                new_fields[i] = vfi
-            else
-                new_fields[i] = tmeet(vfi, widenconst(getfield_tfunc(t, Const(i))))
-                if new_fields[i] === Bottom
-                    return Bottom
-                end
-            end
-        end
-        return tuple_tfunc(new_fields)
-    elseif isa(v, Conditional)
-        if !(Bool <: t)
-            return Bottom
-        end
-        return v
-    end
-    ti = typeintersect(widenconst(v), t)
-    valid_as_lattice(ti) || return Bottom
-    return ti
-end