remove cache as store can do the same thing

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

cache/cache.go

@@ -1,34 +0,0 @@
-// Package cache is a caching interface
-package cache
-
-import "context"
-
-// Cache is an interface for caching
-type Cache interface {
-	// Initialise options
-	Init(...Option) error
-	// Get a value
-	Get(ctx context.Context, key string) (interface{}, error)
-	// Set a value
-	Set(ctx context.Context, key string, val interface{}) error
-	// Delete a value
-	Delete(ctx context.Context, key string) error
-	// Name of the implementation
-	String() string
-}
-
-// Options struct
-type Options struct {
-	Nodes   []string
-	Context context.Context
-}
-
-// Option func
-type Option func(o *Options)
-
-// Nodes sets the nodes for the cache
-func Nodes(v ...string) Option {
-	return func(o *Options) {
-		o.Nodes = v
-	}
-}