Fix ReadMe

[owenyeo]

ReadMe was outdated with wrong info about TimetaBRO. Outdated methods that were not used were present as well.

Fix README.md to reflect changes, and delete redundant methods.

[codecov]

Codecov Report

Merging #328 (a1f5f3b) into master (1cf0000) will decrease coverage by 0.32%.
Report is 22 commits behind head on master.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #328      +/-   ##
============================================
- Coverage     75.74%   75.42%   -0.32%     
- Complexity      968      970       +2     
============================================
  Files           110      110              
  Lines          3030     3052      +22     
  Branches        358      367       +9     
============================================
+ Hits           2295     2302       +7     
- Misses          648      660      +12     
- Partials         87       90       +3     

Files	Coverage Δ
...java/seedu/address/model/person/timetable/Cca.java	100.00% <ø> (ø)
...edu/address/model/person/timetable/DatedEvent.java	82.14% <ø> (-11.98%)	⬇️
...a/seedu/address/model/person/timetable/Module.java	94.11% <ø> (-0.33%)	⬇️

... and 1 file with indirect coverage changes

[teozhengyang]

LGTM