minor changes to about activity

app/src/main/res/values/strings.xml

@@ -184,8 +184,6 @@
     <string name="grid_size_8">8</string>
     <string name="colored_footers">Colored footers</string>
     <string name="special_thanks_to">Special thanks to</string>
-    <string name="changelog">Changelog</string>
-    <string name="licenses">Licenses</string>
     <string name="permissions_denied">Permissions denied.</string>
     <string name="permission_external_storage_denied">Permission to access external storage denied.</string>
     <string name="support_development">Support development</string>
@@ -193,10 +191,10 @@
     <string name="thank_you">Thank you!</string>
     <string name="restored_previous_purchase_please_restart">Restored previous purchase. Please restart the app to make use of all features.</string>
     <string name="version">Version</string>
+    <string name="source">Source</string>
     <string name="author">Author</string>
     <string name="write_an_email">Write an email</string>
     <string name="follow_on_twitter">Follow on Twitter</string>
-    <string name="fork_on_github">Fork on GitHub</string>
     <string name="visit_website">Visit website</string>
     <string name="report_bugs">Report bugs</string>
     <string name="report_bugs_summary">Report bugs or request new features.</string>
@@ -214,7 +212,6 @@
     <string name="loading_products">Loading products…</string>
     <string name="up_next">Up next</string>
     <string name="pref_title_now_playing_screen_appearance">Appearance</string>
-    <string name="intro_label">Introduction</string>
     <string name="welcome_to_phonograph">"Welcome to Phonograph, a beautiful and lightweight music player for Android. "</string>
     <string name="open_playing_queue_instruction">Swipe the card in the now playing screen up to reveal the full playing queue.</string>
     <string name="rearrange_playing_queue_instruction">Rearrange the playing queue by dragging a song from its track number.</string>