Remove duplicated unnecessary file. It's in the groupcachepb sub-package.
diff --git a/groupcache.pb.go b/groupcache.pb.go
deleted file mode 100644
index db12197..0000000
--- a/groupcache.pb.go
+++ /dev/null
@@ -1,65 +0,0 @@
-// Code generated by protoc-gen-go.
-// source: groupcache.proto
-// DO NOT EDIT!
-
-package groupcache
-
-import proto "code.google.com/p/goprotobuf/proto"
-import json "encoding/json"
-import math "math"
-
-// Reference proto, json, and math imports to suppress error if they are not otherwise used.
-var _ = proto.Marshal
-var _ = &json.SyntaxError{}
-var _ = math.Inf
-
-type GetRequest struct {
-	Group            *string `protobuf:"bytes,1,req,name=group" json:"group,omitempty"`
-	Key              *string `protobuf:"bytes,2,req,name=key" json:"key,omitempty"`
-	XXX_unrecognized []byte  `json:"-"`
-}
-
-func (m *GetRequest) Reset()         { *m = GetRequest{} }
-func (m *GetRequest) String() string { return proto.CompactTextString(m) }
-func (*GetRequest) ProtoMessage()    {}
-
-func (m *GetRequest) GetGroup() string {
-	if m != nil && m.Group != nil {
-		return *m.Group
-	}
-	return ""
-}
-
-func (m *GetRequest) GetKey() string {
-	if m != nil && m.Key != nil {
-		return *m.Key
-	}
-	return ""
-}
-
-type GetResponse struct {
-	Value            []byte   `protobuf:"bytes,1,opt,name=value" json:"value,omitempty"`
-	MinuteQps        *float64 `protobuf:"fixed64,2,opt,name=minute_qps" json:"minute_qps,omitempty"`
-	XXX_unrecognized []byte   `json:"-"`
-}
-
-func (m *GetResponse) Reset()         { *m = GetResponse{} }
-func (m *GetResponse) String() string { return proto.CompactTextString(m) }
-func (*GetResponse) ProtoMessage()    {}
-
-func (m *GetResponse) GetValue() []byte {
-	if m != nil {
-		return m.Value
-	}
-	return nil
-}
-
-func (m *GetResponse) GetMinuteQps() float64 {
-	if m != nil && m.MinuteQps != nil {
-		return *m.MinuteQps
-	}
-	return 0
-}
-
-func init() {
-}