Remove the manifest_merger rule attribute.
Remove the manifest_merger rule attribute.

It's been removed in bazel 13.

google/gapid,Qining/gapid,pmuetschard/gapid,pmuetschard/gapid,google/agi,Qining/gapid,Qining/gapid,google/gapid,pmuetschard/gapid,pmuetschard/gapid,pmuetschard/gapid,Qining/gapid,pmuetschard/gapid,Qining/gapid,google/gapid,google/gapid,Qining/gapid,pmuetschard/gapid,Qining/gapid,Qining/gapid,google/agi,google/agi,google/agi,google/gapid,google/agi,google/gapid,google/agi,google/agi,google/gapid,pmuetschard/gapid,google/gapid,google/agi