Update example to remove references of progressbar

[Cl4sm]

This is an attempt to resolve the failing CI for this PR https://github.com/angr/angr/pull/3885 (Patcherex pr https://github.com/angr/patcherex/pull/48)

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Test Results

41 tests   - 7   41 :heavy_check_mark:  - 3   6m 59s :stopwatch: - 48m 2s 10 suites +1     0 :zzz: ±0  10 files   +1     0 :x: ±0 

Results for commit 182de6b2. ± Comparison against base commit bc8c3871.

This pull request removes 11 and adds 4 tests. Note that renamed tests count towards both.

``` test_examples ‑ test_0ctf_momo_3 test_examples ‑ test_CADET_00001 test_examples ‑ test_asisctffinals2015_fake test_examples ‑ test_b01lersctf test_examples ‑ test_cmu_binary_bomb test_examples ‑ test_csaw_wyvern test_examples ‑ test_defcon2019quals_veryandroidoso test_examples ‑ test_flareon2015_5 test_examples ‑ test_mbrainfuzz test_examples ‑ test_mma_simplehash … ``` ``` test_examples ‑ test_ais3_crackme test_examples ‑ test_csci_1 test_examples ‑ test_ekopartyctf2016_rev250 test_gitbook.TestGitbook ‑ test_docs ```

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Test Results

41 tests   - 13   41 :heavy_check_mark:  - 7   6m 19s :stopwatch: - 1h 8m 48s 10 suites ±  0     0 :zzz: ±0  10 files   ±  0     0 :x:  - 1 

Results for commit 402acf97. ± Comparison against base commit bc8c3871.

This pull request removes 13 tests.

``` test_examples ‑ test_0ctf_momo_3 test_examples ‑ test_CADET_00001 test_examples ‑ test_asisctffinals2015_fake test_examples ‑ test_b01lersctf test_examples ‑ test_cmu_binary_bomb test_examples ‑ test_csaw_wyvern test_examples ‑ test_defcon2019quals_veryandroidoso test_examples ‑ test_flareon2015_5 test_examples ‑ test_hitcon2017_sakura test_examples ‑ test_mbrainfuzz … ```

:recycle: This comment has been updated with latest results.