Revert "fix CI..."

This reverts commit 94b2816446.

.travis.yml

@@ -4,7 +4,6 @@ go:
   - 1.3
   - 1.4
   - 1.5
-  - tip
 
 before_install:
   - sudo apt-get update -qq
@@ -12,7 +11,6 @@ before_install:
   - go get github.com/msteinert/pam 
 
 install:
-  - go get -v github.com/go-xorm/xorm
   - go get -t -v ./...
 
 script: go build -v -tags "pam"