Revert "Use in-memory http caching" (#127)

The current cache implementation has some issues with both authenticated
requests and freshness of data, so reverting it while we work on
improvements.

This reverts commit 5bebbba.

Author: asvoboda

.gitignore

@@ -3,6 +3,5 @@
 *.iml
 *.ipr
 *.iws
-config/bulldozer.yml
 
 build/

Gopkg.lock

@@ -17,7 +17,6 @@ package server
 import (
 	"fmt"
 
-	"github.com/gregjones/httpcache"
 	"github.com/palantir/go-baseapp/baseapp"
 	"github.com/palantir/go-baseapp/baseapp/datadog"
 	"github.com/palantir/go-githubapp/githubapp"
@@ -54,7 +53,6 @@ func New(c *Config) (*Server, error) {
 		c.Github,
 		githubapp.WithClientUserAgent(userAgent),
 		githubapp.WithClientMiddleware(
-			githubapp.ClientCaching(func() httpcache.Cache { return httpcache.NewMemoryCache() }),
 			githubapp.ClientLogging(zerolog.DebugLevel),
 			githubapp.ClientMetrics(base.Registry()),
 		),