Remove require pflag v1.0.3

go.mod

diff --git a/go.mod b/go.mod
index 4832ded..b2287ee 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,3 @@
 module github.com/spf13/pflag
 
 go 1.12
-
-require github.com/spf13/pflag v1.0.3

go.sum

diff --git a/go.sum b/go.sum
index edd0bcf..e69de29 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +0,0 @@
-github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
-github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=