Your signature is already legal and within the limit. You won't get warned for using this signature.
Here a quick reminder of the Signature rules taken from the
Official Site Rules and PoliciesQuote
Signature Rules and Guidelines (violations may result in loss of rights to have a signature):
The entire size of your signature shall not exceed 400 pixels wide by 150 pixels high.
Text sections of your signature shall not exceed 6 lines of text if you include no images, and 3 lines of text if you have an image.
Total size of the images contained in your signature shall not exceed 70 kilobytes.