Removing support for SARL product MacOS x86 non 64

Eclipse stop maintaining 32 bits version for Mac, we do the same, see
the following URL for more details
http://www.eclipse.org/projects/project-
plan.php?planurl=/eclipse/development/plans/eclipse_project_plan_4_5.xml

tycho-parent/pom.xml

@@ -68,11 +68,6 @@
 							<ws>cocoa</ws>
 							<arch>x86_64</arch>
 						</environment>
-						<environment>
-							<os>macosx</os>
-							<ws>cocoa</ws>
-							<arch>x86</arch>
-						</environment>
 						<environment>
 							<os>linux</os>
 							<ws>gtk</ws>
@@ -151,9 +146,9 @@
 
 	<repositories>
 		<repository>
-			<id>org.eclipse.ide.luna</id>
+			<id>org.eclipse.ide.mars</id>
 			<layout>p2</layout>
-			<url>http://download.eclipse.org/releases/luna</url>
+			<url>http://download.eclipse.org/releases/mars</url>
 		</repository>
 		<repository>
 			<id>org.eclipse.xtext.update.lastest</id>