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>
@@ -54,15 +54,15 @@
 		<meta property="file-as" refines="#author">Mitra, S. M.</meta>
 		<meta property="se:name.person.full-name" refines="#author">Siddha Mohana Mitra</meta>
 		<meta property="se:url.authority.nacoaf" refines="#author">http://id.loc.gov/authorities/names/n81082014</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">edc</meta>
+		<meta property="role" refines="#author" scheme="marc:relators">edc</meta>
 		<dc:contributor id="editor">Nancy Bell</dc:contributor>
 		<meta property="file-as" refines="#editor">Bell, Nancy</meta>
 		<meta property="se:name.person.full-name" refines="#editor">Nancy Regina Emily Meugens Bell</meta>
 		<meta property="se:url.encyclopedia.wikipedia" refines="#editor">https://en.wikipedia.org/wiki/Nancy_Bell_(author)</meta>
 		<meta property="se:url.authority.nacoaf" refines="#editor">http://id.loc.gov/authorities/names/n90629657</meta>
-		<meta property="se:role" refines="#editor" scheme="marc:relators">aui</meta>
+		<meta property="role" refines="#editor" scheme="marc:relators">aui</meta>
 		<meta property="role" refines="#editor" scheme="marc:relators">edt</meta>
 		<dc:contributor id="artist">Edwin Lord Weeks</dc:contributor>
 		<meta property="file-as" refines="#artist">Weeks, Edwin Lord</meta>
@@ -81,11 +81,11 @@
 		<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="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>
 		<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>