[milo] remove linkBase and calculate links directly.

milo/buildsource/swarming/build_test.go

Index: milo/buildsource/swarming/build_test.go
diff --git a/milo/buildsource/swarming/build_test.go b/milo/buildsource/swarming/build_test.go
index 517cd8fd5c90a3f448c98e728302201cea5b2e4c..47d663b9bc20c2a7ed4218308e1c16e8df8b9d9f 100644
--- a/milo/buildsource/swarming/build_test.go
+++ b/milo/buildsource/swarming/build_test.go
@@ -66,7 +66,7 @@ func TestBuild(t *testing.T) {
 
 			fmt.Printf("Generating expectations for %s\n", tc)
 
-			build, err := bl.SwarmingBuildImpl(c, svc, "foo", tc.name)
+			build, err := bl.SwarmingBuildImpl(c, svc, tc.name)
 			if err != nil {
 				panic(fmt.Errorf("Could not run swarmingBuildImpl for %s: %s", tc, err))
 			}
@@ -108,12 +108,12 @@ func TestBuild(t *testing.T) {
 							Identity:       identity.AnonymousIdentity,
 							IdentityGroups: []string{"all"},
 						})
-						_, err := bl.SwarmingBuildImpl(c, svc, "foo", tc.name)
+						_, err := bl.SwarmingBuildImpl(c, svc, tc.name)
 						So(err.Error(), ShouldResemble, "Not a Milo Job or access denied")
 					})
 				}
 
-				build, err := bl.SwarmingBuildImpl(c, svc, "foo", tc.name)
+				build, err := bl.SwarmingBuildImpl(c, svc, tc.name)
 				So(err, ShouldBeNil)
 				So(build, shouldMatchExpectationsFor, tc.name+".json")
 			})