Remove Sourcerer

[rohitgr7]

What does this PR do?

Sourcerer is gone: sourcerer-io/sourcerer-app#632 (comment)

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[codecov]

Codecov Report

Merging #5172 (417d096) into master (88b55e4) will decrease coverage by 0%.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #5172   +/-   ##
======================================
- Coverage      93%     93%   -0%     
======================================
  Files         134     134           
  Lines        9933    9933           
======================================
- Hits         9247    9240    -7     
- Misses        686     693    +7     

[rohitgr7]

@edenlightning @williamFalcon mind review?