Remove unused includes in enc_tde.c

[jeltz]

These includes were used by functions which have now been removed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.65%. Comparing base (086b342) to head (b70ed4c).
Report is 6 commits behind head on TDE_REL_17_STABLE.

❌ Your project status has failed because the head coverage (84.65%) is below the target coverage (90.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@                  Coverage Diff                  @@
##           TDE_REL_17_STABLE     #430      +/-   ##
=====================================================
- Coverage              84.76%   84.65%   -0.11%     
=====================================================
  Files                     21       21              
  Lines                   2566     2588      +22     
  Branches                 393      401       +8     
=====================================================
+ Hits                    2175     2191      +16     
- Misses                   311      316       +5     
- Partials                  80       81       +1     

Components	Coverage Δ
access	81.11% <ø> (ø)
catalog	88.22% <ø> (-0.40%)	⬇️
common	77.77% <ø> (ø)
encryption	73.45% <ø> (ø)
keyring	72.88% <ø> (ø)
src	91.44% <ø> (ø)
smgr	94.85% <ø> (ø)
transam	∅ <ø> (∅)

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