Remove duplicate program element in POM

[anguillanneuf]

Fixes#6107

[codecov]

Codecov Report

Merging #6108 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #6108 +/- ##
============================================
+ Coverage 47.38% 47.38% +<.01% + Complexity 27197 27182 -15 
============================================
Files 2523 2523 Lines 274599 274599 Branches 31378 31383 +5 ============================================
+ Hits 130117 130123 +6 + Misses 134869 134863 -6 
Partials 9613 9613

Impacted Files	Coverage Δ	Complexity Δ
.../cloud/datastore/testing/LocalDatastoreHelper.java	85.07% <0%> (+4.47%)	17% <0%> (ø)	⬇️
.../java/com/google/cloud/testing/CommandWrapper.java	96.96% <0%> (+9.09%)	13% <0%> (ø)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 13fc06a...c9c33ac. Read the comment docs.