start to move session stores into there own key value in memory store

src/session/session_store.go

@@ -7,10 +7,3 @@ type SessionData struct {
 	CSRFToken string    `json:"csrftoken"`
 	ExpiresAt time.Time `json:"expiresat"`
 }
-
-type SessionStore interface {
-	Create(sessionID string, session *SessionData) error
-	Get(sessionID string) (*SessionData, error)
-	Update(sessionID string, session *SessionData) error
-	Delete(sessionID string) error
-}