Remove unused expected output files key_ebpf-issue-1020*.p4

[jafingerhut]

No description provided.

[jafingerhut]

It appears fruffy renamed the test program in 2018 with commit

Date:   Sun Aug 5 14:50:44 2018 -0700
Author: fruffy <[email protected]>
commit f6cf471018a716b73163c08646b19e9e49abec1e

and added updated expected test outputs for the new test program name key-issue-1020_ebpf.p4.

These files are identical:

testdata/p4_16_samples_outputs/key-issue-1020_ebpf.p4
testdata/p4_16_samples_outputs/key_ebpf-issue-1020.p4

Keeping these files:

./testdata/p4_16_samples/key-issue-1020_ebpf.p4
./testdata/p4_16_samples/key-issue-1020_ebpf.stf
./testdata/p4_16_samples_outputs/key-issue-1020_ebpf-first.p4
./testdata/p4_16_samples_outputs/key-issue-1020_ebpf-frontend.p4
./testdata/p4_16_samples_outputs/key-issue-1020_ebpf-midend.p4
./testdata/p4_16_samples_outputs/key-issue-1020_ebpf.p4
./testdata/p4_16_samples_outputs/key-issue-1020_ebpf.p4-stderr

Deleting these files:

./testdata/p4_16_samples_outputs/key_ebpf-issue-1020-first.p4
./testdata/p4_16_samples_outputs/key_ebpf-issue-1020-frontend.p4
./testdata/p4_16_samples_outputs/key_ebpf-issue-1020-midend.p4
./testdata/p4_16_samples_outputs/key_ebpf-issue-1020.p4
./testdata/p4_16_samples_outputs/key_ebpf-issue-1020.p4-stderr