Retire check for method presence

bind_call introduced in 2.7

lib/dry/types/predicate_registry.rb

@@ -15,27 +15,14 @@ module Dry
       KERNEL_RESPOND_TO = ::Kernel.instance_method(:respond_to?)
       private_constant(:KERNEL_RESPOND_TO)
 
-      if ::UnboundMethod.method_defined?(:bind_call)
-        # @api private
-        def initialize(predicates = Logic::Predicates)
-          @predicates = predicates
-        end
+      # @api private
+      def initialize(predicates = Logic::Predicates)
+        @predicates = predicates
+      end
 
-        # @api private
-        def key?(name)
-          KERNEL_RESPOND_TO.bind_call(@predicates, name)
-        end
-      else
-        # @api private
-        def initialize(predicates = Logic::Predicates)
-          @predicates = predicates
-          @has_predicate = KERNEL_RESPOND_TO.bind(@predicates)
-        end
-
-        # @api private
-        def key?(name)
-          has_predicate.(name)
-        end
+      # @api private
+      def key?(name)
+        KERNEL_RESPOND_TO.bind_call(@predicates, name)
       end
 
       # @api private