Remove delete match arm and match guard mutation exclusion

As of the most recent cargo mutants version v25.2.0 delete match arm
and replace match guard mutations can now be identified on function
name patterns and as a result can be effectively excluded using the
existing mutation exclusion patterns.

Author: benalleng

.cargo/mutants.toml

@@ -10,7 +10,6 @@ exclude_re = [
     ".*Error",
     "deserialize", # Skip serde mutation tests
     "Iterator", # Mutating operations in an iterator can result in an infinite loop
-    "match arm", "match guard", # New addition in cargo-mutants 25.0.1 deletes match arms and replaces match guards even in excluded functions
 
     # ----------------------------------Crate-specific exclusions----------------------------------
     # Units