refactor: remove old/non-urgen/resolved FIXMEs

cli/app/list.go

@@ -183,7 +183,6 @@ can take some time.
 							stats.latestCount++
 						}
 					} else {
-						// FIXME: jeezus golang why do you not have a list reverse function
 						for i, j := 0, len(newUpdates)-1; i < j; i, j = i+1, j-1 {
 							newUpdates[i], newUpdates[j] = newUpdates[j], newUpdates[i]
 						}

cli/app/rollback.go

@@ -112,7 +112,6 @@ recipes.
 			}
 		}
 
-		// FIXME: jeezus golang why do you not have a list reverse function
 		for i, j := 0, len(availableDowngrades)-1; i < j; i, j = i+1, j-1 {
 			availableDowngrades[i], availableDowngrades[j] = availableDowngrades[j], availableDowngrades[i]
 		}

cli/app/run.go

@@ -82,11 +82,7 @@ var appRunCommand = &cli.Command{
 			execCreateOpts.Tty = false
 		}
 
-		// FIXME: an absolutely monumental hack to instantiate another command-line
-		// client withing our command-line client so that we pass something down
-		// the tubes that satisfies the necessary interface requirements. We should
-		// refactor our vendored container code to not require all this cruft.  For
-		// now, It Works.
+		// FIXME: avoid instantiating a new CLI
 		dcli, err := command.NewDockerCli()
 		if err != nil {
 			logrus.Fatal(err)