ci: remove jcmturner group (not a dependency)

Author: dlevy-msft-sql

.github/dependabot.yml

@@ -34,7 +34,6 @@ updates:
         patterns:
           - "github.com/AzureAD/*"
           - "github.com/golang-jwt/*"
-          - "github.com/jcmturner/*"
       testing:
         patterns:
           - "github.com/stretchr/*"
@@ -47,7 +46,6 @@ updates:
           - "golang.org/x/*"
           - "github.com/AzureAD/*"
           - "github.com/golang-jwt/*"
-          - "github.com/jcmturner/*"
           - "github.com/stretchr/*"
 
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