Steps To Remove Credit Links:
First of all go to Blogger.com
Just Login to your Blogger Profile and select your blog.
Now go to Dashboard > Template > Edit HTML.
Go to the footer and find the credit/footer link which needs to remove/hide. You'll find something like Copyright, credit or designed etc (Like picture shown below).
Add the following line with your original copyright ID. (As shown in picture below).
style="visibility: hidden"
Now, you need to Save your Template.
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