Remove 'se:role' metadata in favor of 'role' available in EPUB 3.3

src/epub/content.opf

@@ -8,9 +8,9 @@
 		<dc:publisher id="publisher">Standard Ebooks</dc:publisher>
 		<meta property="file-as" refines="#publisher">Standard Ebooks</meta>
 		<meta property="se:url.homepage" refines="#publisher">https://standardebooks.org</meta>
-		<meta property="se:role" refines="#publisher" scheme="marc:relators">bkd</meta>
-		<meta property="se:role" refines="#publisher" scheme="marc:relators">mdc</meta>
-		<meta property="se:role" refines="#publisher" scheme="marc:relators">pbl</meta>
+		<meta property="role" refines="#publisher" scheme="marc:relators">bkd</meta>
+		<meta property="role" refines="#publisher" scheme="marc:relators">mdc</meta>
+		<meta property="role" refines="#publisher" scheme="marc:relators">pbl</meta>
 		<dc:contributor id="type-designer">The League of Moveable Type</dc:contributor>
 		<meta property="file-as" refines="#type-designer">League of Moveable Type, The</meta>
 		<meta property="se:url.homepage" refines="#type-designer">https://www.theleagueofmoveabletype.com</meta>
@@ -73,10 +73,10 @@
 		<meta property="file-as" refines="#author">Sterne, Laurence</meta>
 		<meta property="se:url.encyclopedia.wikipedia" refines="#author">https://en.wikipedia.org/wiki/Laurence_Sterne</meta>
 		<meta property="se:url.authority.nacoaf" refines="#author">http://id.loc.gov/authorities/names/n79073616</meta>
-		<meta property="se:role" refines="#author" scheme="marc:relators">ann</meta>
+		<meta property="role" refines="#author" scheme="marc:relators">ann</meta>
 		<meta property="role" refines="#author" scheme="marc:relators">aut</meta>
-		<meta property="se:role" refines="#author" scheme="marc:relators">ill</meta>
-		<meta property="se:role" refines="#author" scheme="marc:relators">wpr</meta>
+		<meta property="role" refines="#author" scheme="marc:relators">ill</meta>
+		<meta property="role" refines="#author" scheme="marc:relators">wpr</meta>
 		<dc:contributor id="introduction">George Saintsbury</dc:contributor>
 		<meta property="file-as" refines="#introduction">Saintsbury, George</meta>
 		<meta property="se:name.person.full-name" refines="#introduction">George Edward Bateman Saintsbury</meta>
@@ -102,12 +102,12 @@
 		<meta property="file-as" refines="#producer-1">Whittleton, Robin</meta>
 		<meta property="se:url.homepage" refines="#producer-1">https://www.robinwhittleton.com</meta>
 		<meta property="role" refines="#producer-1" scheme="marc:relators">bkp</meta>
-		<meta property="se:role" refines="#producer-1" scheme="marc:relators">blw</meta>
-		<meta property="se:role" refines="#producer-1" scheme="marc:relators">cov</meta>
-		<meta property="se:role" refines="#producer-1" scheme="marc:relators">mrk</meta>
-		<meta property="se:role" refines="#producer-1" scheme="marc:relators">pfr</meta>
-		<meta property="se:role" refines="#producer-1" scheme="marc:relators">tyg</meta>
-		<meta property="se:role" refines="#producer-1" scheme="marc:relators">wat</meta>
+		<meta property="role" refines="#producer-1" scheme="marc:relators">blw</meta>
+		<meta property="role" refines="#producer-1" scheme="marc:relators">cov</meta>
+		<meta property="role" refines="#producer-1" scheme="marc:relators">mrk</meta>
+		<meta property="role" refines="#producer-1" scheme="marc:relators">pfr</meta>
+		<meta property="role" refines="#producer-1" scheme="marc:relators">tyg</meta>
+		<meta property="role" refines="#producer-1" scheme="marc:relators">wat</meta>
 		<dc:contributor id="producer-2">Alex Cabal</dc:contributor>
 		<meta property="file-as" refines="#producer-2">Cabal, Alex</meta>
 		<meta property="se:url.homepage" refines="#producer-2">https://alexcabal.com</meta>