Remove all SIL-specific stuff

[kinke]

Moving it to SIL instead.

[codecov[bot]]

Codecov Report

Merging #122 (6ecd824) into master (0dff1bb) will decrease coverage by 0.09%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #122      +/-   ##
==========================================
- Coverage   15.29%   15.20%   -0.09%     
==========================================
  Files          12       12              
  Lines        1419     1427       +8     
==========================================
  Hits          217      217              
- Misses       1202     1210       +8     

Files Changed	Coverage Δ
source/jmap/api.d	0.00% <ø> (ø)
source/symmetry/imap/request.d	0.00% <0.00%> (ø)

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[kinke]

Still need to confirm @SILdoc.

[kinke]

No idea how it's working in detail, but @SILdoc is working as-is without depending on sil-lang. I've tested a full REPL:

> :? imap.Capability
imap.CapabilityEnumMembers
Capabilities of mail server

[skoppe]

No idea how it's working in detail, but @SILdoc is working as-is without depending on sil-lang.

Its an alias to some symbol in mir IIRC.