Removes a clause guard so the clause matches without its when condition:

def f(x) when is_binary(x), do: value  →  def f(x), do: value
case value do x when is_atom(x) -> x end  →  case value do x -> x end

Guards on def, defp, case, receive, and fn clauses are eligible. A multi-pattern anonymous-function clause is skipped because its guardless head cannot be rendered as a clean report diff.

A guard is removed only when no other enabled mutator produces a mutation inside it. This avoids duplicating mutations such as:

• x > 0, already covered by relational and conditional mutations
• Integer.is_even(x), covered by the Integer family
• abs(x) > 0, covered by relational and call-removal mutations

Guards such as is_binary(x), a bare value, or an otherwise untouched custom guard remain eligible. This check uses the active mutator set: disabling the family that covers a guard can make guard removal available.

This family is enabled by default and uses the guard_drop ignore name.