Remove dead mesa library

autobuild.xml

@@ -1328,32 +1328,6 @@
         <key>version</key>
         <string>1.0.542456</string>
       </map>
-      <key>mesa</key>
-      <map>
-        <key>license</key>
-        <string>mesa</string>
-        <key>license_file</key>
-        <string>LICENSES/mesa.txt</string>
-        <key>name</key>
-        <string>mesa</string>
-        <key>platforms</key>
-        <map>
-          <key>linux</key>
-          <map>
-            <key>archive</key>
-            <map>
-              <key>hash</key>
-              <string>22c50a5d362cad311b4f413cfcffbba2</string>
-              <key>url</key>
-              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/hg/repo/mesa_3p-update-mesa/rev/297294/arch/Linux/installer/mesa-7.11.1.297294-linux-297294.tar.bz2</string>
-            </map>
-            <key>name</key>
-            <string>linux</string>
-          </map>
-        </map>
-        <key>version</key>
-        <string>7.11.1.297294</string>
-      </map>
       <key>minizip-ng</key>
       <map>
         <key>canonical_repo</key>