Revert "Build for Solaris"

This reverts commit 5a2328d9a5f6aca1ff3609c61788d7357d81df83.

build.sh

@@ -121,7 +121,7 @@ case "$1" in
 		godep go build ./cmd/stpidx
 		godep go build ./cmd/stcli
 
-		for os in darwin-amd64 linux-386 linux-amd64 freebsd-amd64 windows-amd64 windows-386 solaris-amd64 ; do
+		for os in darwin-amd64 linux-386 linux-amd64 freebsd-amd64 windows-amd64 windows-386 ; do
 			export GOOS=${os%-*}
 			export GOARCH=${os#*-}
 

cmd/syncthing/upgrade.go

@@ -2,8 +2,6 @@
 // Use of this source code is governed by an MIT-style license that can be
 // found in the LICENSE file.
 
-// +build !solaris
-
 package main
 
 import (

cmd/syncthing/upgrade_solaris.go

@@ -1,7 +0,0 @@
-package main
-
-import "errors"
-
-func upgrade() error {
-	return errors.New("Upgrade currently unsupported on Solaris")
-}