Fix bug, remove unnecessary flag, fix hash comparison on Linux

[MikhailArkhipov]

Fixes #1717

• Remove flag that is obsolete
• Fix case in hash comparison

This pull request:

• Has a title summarizes what is changing
• Has unit tests & code coverage is not adversely affected (within reason)
• Works on all actively maintained versions of Python (e.g. Python 2.7 & the latest Python 3 release)
• Works on Windows 10, macOS, and Linux (e.g. considered file system case-sensitivity)

[codecov]

Codecov Report

Merging #1734 into master will increase coverage by 0.21%.
The diff coverage is 77.77%.

@@            Coverage Diff             @@
##           master    #1734      +/-   ##
==========================================
+ Coverage   73.56%   73.77%   +0.21%     
==========================================
  Files         279      279              
  Lines       13060    13049      -11     
  Branches     2328     2329       +1     
==========================================
+ Hits         9607     9627      +20     
+ Misses       3314     3289      -25     
+ Partials      139      133       -6

Impacted Files	Coverage Δ
src/client/activation/downloader.ts	19.31% <ø> (+2.01%)	⬆️
src/client/activation/analysis.ts	15.26% <ø> (ø)	⬆️
src/client/common/configSettings.ts	88.09% <ø> (+0.44%)	⬆️
src/client/common/types.ts	100% <ø> (ø)	⬆️
src/client/activation/hashVerifier.ts	23.52% <0%> (ø)	⬆️
src/client/formatters/lineFormatter.ts	98.36% <100%> (+0.06%)	⬆️
...rc/client/debugger/PythonProcessCallbackHandler.ts	53.61% <0%> (ø)	⬆️
src/client/debugger/mainV2.ts	78.71% <0%> (+0.8%)	⬆️
src/client/debugger/PythonProcess.ts	51.25% <0%> (+5.41%)	⬆️

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