```ruby
module Virtus

  class Configuration

    attr_accessor :coerce

    def initialize
      @coerce  = true
      @coercer = Coercible::Coercer.new
    end

    def call(&block)
      yield self if block_given?
      self
    end

    def coercer(&block)
      @coercer = Coercible::Coercer.new(&block) if block
      @coercer
    end

  end # class Configuration

end # module Virtus
```

Remove unused block capture in Configuration
user
```ruby
module Virtus

  class Configuration

    attr_accessor :coerce

    def initialize
      @coerce  = true
      @coercer = Coercible::Coercer.new
    end

      yield self if block_given?
      self
    end

    def coercer(&block)
      @coercer = Coercible::Coercer.new(&block) if block
      @coercer
    end

  end # class Configuration

end # module Virtus
```
assistant