do not use outdated egit github p2 repository anymore

Author: martinlippert

eclipse-distribution/pom.xml

@@ -484,11 +484,11 @@
 			<layout>p2</layout>
 			<url>https://download.eclipse.org/egit/github/updates</url>
 		</repository> -->
-		<repository>
+<!--		<repository>
 			<id>egit-github</id>
 			<layout>p2</layout>
 			<url>https://download.eclipse.org/egit/github/updates-stable-nightly/</url>
-		</repository>
+		</repository> -->
 		<!--		<repository>
 			<id>m2e-apt</id>
 			<layout>p2</layout>