all: go mod tidy

Change-Id: I9a21ef4bab1014d3b074152b0accaa58ba3f3a8d
Reviewed-on: https://team-review.git.corp.google.com/c/golang/vulndb/+/1061624
Reviewed-by: Roland Shoemaker <bracewell@google.com>
diff --git a/go.mod b/go.mod
index 277ce16..1cc084f 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,6 @@
 go 1.16
 
 require (
-	github.com/BurntSushi/toml v0.3.1
 	github.com/google/go-cmp v0.5.4
 	golang.org/x/mod v0.4.1
 	gopkg.in/yaml.v2 v2.4.0
diff --git a/go.sum b/go.sum
index da7aa5a..ee3a75f 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,3 @@
-github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/google/go-cmp v0.5.4 h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=