Excision: Remove all non-Condor code

[DilumAluthge]

Blocked by:

• TODO: This repo currently has no tests for HCTManager (the HTCondor manager) #6

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 1.29%. Comparing base (e683c53) to head (7245492).
⚠️ Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
src/condor.jl	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #5       +/-   ##
==========================================
- Coverage   18.25%   1.29%   -16.96%     
==========================================
  Files           7       2        -5     
  Lines         389      77      -312     
==========================================
- Hits           71       1       -70     
+ Misses        318      76      -242     

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[DilumAluthge]

I think we need #6 first.