removed old jwt library

gateway/go.mod

@@ -10,7 +10,6 @@ require (
 	github.com/caddyserver/certmagic v0.12.0
 	github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
 	github.com/denisenkom/go-mssqldb v0.0.0-20200428022330-06a60b6afbbc
-	github.com/dgrijalva/jwt-go v3.2.0+incompatible
 	github.com/doug-martin/goqu/v8 v8.6.0
 	github.com/fatih/structs v1.1.0
 	github.com/getlantern/deepcopy v0.0.0-20160317154340-7f45deb8130a

gateway/go.sum

@@ -71,8 +71,6 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/denisenkom/go-mssqldb v0.0.0-20200428022330-06a60b6afbbc h1:VRRKCwnzqk8QCaRC4os14xoKDdbHqqlJtJA0oc1ZAjg=
 github.com/denisenkom/go-mssqldb v0.0.0-20200428022330-06a60b6afbbc/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
-github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
-github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
 github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=