Remove bitwise operations and testing

[mborland]

Closes: #1204

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.8%. Comparing base (1def358) to head (40e0570).
⚠️ Report is 6 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #1296     +/-   ##
=========================================
- Coverage     98.9%   98.8%   -0.0%     
=========================================
  Files          270     270             
  Lines        17956   17653    -303     
  Branches      1998    1908     -90     
=========================================
- Hits         17742   17439    -303     
  Misses         214     214             

Files with missing lines	Coverage Δ
include/boost/decimal/decimal128_t.hpp	96.7% <ø> (-0.1%)	⬇️
include/boost/decimal/decimal32_t.hpp	96.5% <ø> (-0.1%)	⬇️
include/boost/decimal/decimal64_t.hpp	95.1% <ø> (-0.1%)	⬇️
include/boost/decimal/detail/cmath/nan.hpp	92.6% <100.0%> (ø)
include/boost/decimal/detail/write_payload.hpp	100.0% <100.0%> (ø)
test/random_decimal128_math.cpp	100.0% <ø> (ø)
test/random_decimal32_math.cpp	100.0% <ø> (ø)
test/random_decimal64_math.cpp	100.0% <ø> (ø)
test/test_cmath.cpp	100.0% <100.0%> (ø)

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