Remove Grey Box : I'm very new to learning very basic HTML. I can't figure out how to remove the grey lines around my follow buttons. Any help is appreciated. Thank you!

[Here's a screenshot of the grey boxes][1]

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-html -->

    <html>
    <head>
    <title>social follow bar</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    </head>
    <body bgcolor="#00FFFFFF" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">
    <!-- Save for Web Slices (social follow bar.psd) -->
    <table id="Table_01" width="250" height="40" border="0" cellpadding="0" cellspacing="0" align="center">
    	<tr>
    		<td rowspan="2">
    			<a href="https://www.pinterest.com/wherefoodtakesus/pins/">
    				<img src="https://wherefoodtakesus.com/wp-content/uploads/Home-Page/Buttons/Social-Sharing-Buttons/Pinterest_button.png" width="40" height="40" border="0" alt="Pinterest-Follow_button"></a></td>
    		<td rowspan="2">
    			<a href="https://www.instagram.com/wherefoodtakesusblog/">
    				<img src="https://wherefoodtakesus.com/wp-content/uploads/Home-Page/Buttons/Social-Sharing-Buttons/Instagram_button.png" width="40" height="40" border="0" alt="Instagram-Follow_button"></a></td>
    		<td rowspan="2">
    			<a href="https://wherefoodtakesus.com/feed/">
    				<img src="https://wherefoodtakesus.com/wp-content/uploads/Home-Page/Buttons/Social-Sharing-Buttons/RSS_button.png" width="40" height="40" border="0" alt="RSS-Follow_button"></a></td>
    		<td rowspan="2">
    			<a href="https://mix.com/wherefoodtakesus">
    				<img src="https://wherefoodtakesus.com/wp-content/uploads/Home-Page/Buttons/Social-Sharing-Buttons/Mix_button.png" width="40" height="40" border="0" alt="Mix-Follow_button"></a></td>
    		
    		<td rowspan="2">
    			<a href="mailto:wherefoodtakesus@gmail.com">
    				<img src="https://wherefoodtakesus.com/wp-content/uploads/Home-Page/Buttons/Social-Sharing-Buttons/Email_button.png" width="40" height="40" border="0" alt="Email_button"></a></td>
    	</tr>
    </table>
    <!-- End Save for Web Slices -->
    </body>
    </html>

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  [1]: https://i.stack.imgur.com/Kp9Kx.png