Revert "Add SystemDrive env var to osqueryd if present in orbit"

[dantecatalfamo]

Reverts #2520

Was asked to revert this PR so we can include it in the next release instead

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.85%. Comparing base (e956220) to head (9bb80f4).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #25239      +/-   ##
==========================================
- Coverage   63.85%   63.85%   -0.01%     
==========================================
  Files        1616     1616              
  Lines      153833   153829       -4     
  Branches     3975     3975              
==========================================
- Hits        98224    98221       -3     
+ Misses      47796    47794       -2     
- Partials     7813     7814       +1     

Flag	Coverage Δ
backend	64.72% <ø> (-0.01%)	⬇️

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