How to remove series of files using awk print command itself?

I can do the deletion with the below command...
bharathkumar@vm-0:~$ ls -lrt [0-9]* | awk '{print $NF}' | xargs kill -9

But i need to try with help pf print command itself below.......why it is not deleting is there any way to do the deletion... please advise?

bharathkumar@vm-0:~$ ls -lrt [0-9]* | awk '{print $NF}'
1
2
3
4
5
6
7
9
8
10
bharathkumar@vm-0:~$ ls -lrt [0-9]* | awk '{print "rm -f " $NF}'
rm -f 1
rm -f 2
rm -f 3
rm -f 4
rm -f 5
rm -f 6
rm -f 7
rm -f 9
rm -f 8
rm -f 10

bharathkumar@vm-0:~$ ls -lrt [0-9]*                                                                                                                                                 
-rw-r--r-- 1 bharathkumar bharathkumar 0 Sep 13 05:52 1
-rw-r--r-- 1 bharathkumar bharathkumar 0 Sep 13 05:52 2
-rw-r--r-- 1 bharathkumar bharathkumar 0 Sep 13 05:52 3
-rw-r--r-- 1 bharathkumar bharathkumar 0 Sep 13 05:52 4
-rw-r--r-- 1 bharathkumar bharathkumar 0 Sep 13 05:52 5
-rw-r--r-- 1 bharathkumar bharathkumar 0 Sep 13 05:52 6
-rw-r--r-- 1 bharathkumar bharathkumar 0 Sep 13 05:52 7
-rw-r--r-- 1 bharathkumar bharathkumar 0 Sep 13 05:52 9
-rw-r--r-- 1 bharathkumar bharathkumar 0 Sep 13 05:52 8
-rw-r--r-- 1 bharathkumar bharathkumar 0 Sep 13 05:52 10
bharathkumar@vm-0:~$