erp5_font: update description and file formats

bt5/erp5_font/SkinTemplateItem/portal_skins/erp5_font/source-sans-pro/source-sans-pro-bold.woff.xml

@@ -6,10 +6,6 @@
     </pickle>
     <pickle>
       <dictionary>
-        <item>
-            <key> <string>_EtagSupport__etag</string> </key>
-            <value> <string>ts56406987.18</string> </value>
-        </item>
         <item>
             <key> <string>__name__</string> </key>
             <value> <string>source-sans-pro-bold.woff</string> </value>
@@ -22,10 +18,6 @@
             <key> <string>precondition</string> </key>
             <value> <string></string> </value>
         </item>
-        <item>
-            <key> <string>size</string> </key>
-            <value> <int>33768</int> </value>
-        </item>
         <item>
             <key> <string>title</string> </key>
             <value> <string>source-sans-pro-bold.woff</string> </value>

bt5/erp5_font/bt/description

-Collection of open source fonts and icon fonts to use across other bt5s. Please ensure proper mime-types:
-svg - "image/svg+xml"
-ttf - "application/x-font-ttf" or "application/x-font-truetype"
-otf - "application/x-font-opentype"
-woff - "application/font-woff"
-woff2 - "application/font-woff2" (proposed by W3C)
-eot - "application/vnd.ms-fontobject"
-sfnt - "application/font-sfnt"
\ No newline at end of file
+Collection of open source fonts and icon fonts to use across other bt5s
\ No newline at end of file