Remove unneeded Teuchos header

[codecov-io]

Codecov Report

Merging #550 into master will increase coverage by 0.04%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #550      +/-   ##
==========================================
+ Coverage   95.89%   95.93%   +0.04%     
==========================================
  Files         134      134              
  Lines        9594     9591       -3     
==========================================
+ Hits         9200     9201       +1     
+ Misses        394      390       -4

Impacted Files	Coverage Δ
...Search/src/details/DTK_DetailsTreeConstruction.hpp	100% <ø> (ø)	:arrow_up:
packages/Search/examples/bvh_driver/bvh_driver.cpp	90.9% <ø> (ø)	:arrow_up:
packages/Search/test/tstBoostRangeAdapters.cpp	100% <ø> (ø)	:arrow_up:
...istributed_tree_driver/distributed_tree_driver.cpp	82.46% <100%> (+1.33%)	:arrow_up:
...es/Search/src/details/DTK_DetailsTreeTraversal.hpp	98.11% <0%> (+0.89%)	:arrow_up:

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[dalg24]

@aprokop Please look over the changes I added and merge if you are happy with them.

[dalg24]

Looks good, but there is nothing in this PR to show why you are able to remove boost checks in code and cmake.

Example and tests require Boost. We agreed we would not run them from DTK so I won't bother add the conditional addition of the example in CMake.

[aprokop]

After the discussion we decided that we shouldn't worry about careful handling of Boost right now, as that was already broken once we added boost::program_options to the drivers (which made Boost a required dependency). Search is going to be moved out soon, so the window for "dtk without boost is broken" is going to be short.

[dalg24]

retest this please