Html Fehler wie bekomme ich die weg?

hallo kann mir jemand dabei helfen dieses hier zu korrigieren:

Validation Output: 2 Errors

Warning Line 187, Column 342: The border attribute is obsolete. Consider specifying img { border: 0; } in CSS instead.

…che.addthis.com/icons/v1/thumbs/facebook.gif" border="0" alt="Facebook" />

✉
Warning Line 188, Column 211: The border attribute is obsolete. Consider specifying img { border: 0; } in CSS instead.

…/cache.addthis.com/icons/v1/thumbs/twitter.gif" border="0" alt="Twitter" />

✉
Warning Line 189, Column 188: The border attribute is obsolete. Consider specifying img { border: 0; } in CSS instead.

…p://cache.addthis.com/icons/v1/thumbs/more.gif" border="0" alt="More..." />

✉
Error Line 190, Column 110: Bad value publisher for attribute rel on element a: Keyword publisher is not registered.

…blisher" style="text-decoration:none;"> <img src="https://ssl.gstatic.com/imag…

Syntax of link type valid for

and <area>:
A whitespace-separated list of link types listed as allowed on

and <area> in the HTML specification or listed as an allowed on

and <area> on the Microformats wiki without duplicate keywords in the list. You can register link types on the Microformats wiki yourself. <br />
Error Line 210, Column 104: Bad value generator for attribute rel on element a: Keyword generator is not registered.

…, Publishing Platform" rel="generator">Proudly powered by WordPress •â€¦

Syntax of link type valid for

and <area>:
A whitespace-separated list of link types listed as allowed on

and <area> in the HTML specification or listed as an allowed on

and <area> on the Microformats wiki without duplicate keywords in the list. You can register link types on the Microformats wiki yourself.