OI12: Remove functionality-Test files

[LakshmiSwethaGavini]

Added the test cases for the functionality.
Created a new file in test/test_gits_rm.py

[codecov-commenter]

Codecov Report

Merging #51 (94636af) into master (4e299cc) will increase coverage by 1.94%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #51      +/-   ##
==========================================
+ Coverage   43.18%   45.13%   +1.94%     
==========================================
  Files          36       38       +2     
  Lines         947      966      +19     
==========================================
+ Hits          409      436      +27     
+ Misses        538      530       -8     

Impacted Files	Coverage Δ
code/gits_rm.py	100.00% <ø> (ø)
code/gits_clone.py	93.33% <100.00%> (+93.33%)	⬆️
code/gits.py	0.00% <0.00%> (ø)
code/gits_reset.py	0.00% <0.00%> (ø)
code/gits_rebase.py	0.00% <0.00%> (ø)
code/gits_profile.py	0.00% <0.00%> (ø)
code/gits_pr_update.py	0.00% <0.00%> (ø)
setup.py	0.00% <0.00%> (ø)

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[ramyasaimullapudi]

Looks good to me.