Further reduce the code

[chainsawriot]

• [x] Evaluate which files / lines in src can be removed
• [x] R code clean up?
• [x] Help file clean up

[chainsawriot]

https://github.com/chainsawriot/minty/blob/c6eeda308afeb65f201927a67cfee02931fc82dd/R/cpp11.R#L3-L37

Among the exported C++ functions, just type_convert_col, parse_vector_, guess_header_, utctime_ (questionable whether it is actually used), collectorGuess are used in the R code.

[chainsawriot]

C++ files with zero coverage (probably not used.)

src/grisu3.c: 0.00%
src/init.c: 0.00%
src/mio.h: 0.00%
src/Source.cpp: 0.00%
src/Source.h: 0.00%
src/SourceFile.h: 0.00%
src/SourceRaw.h: 0.00%
src/SourceString.h: 0.00%
src/Tokenizer.cpp: 0.00%
src/Tokenizer.h: 0.00%
src/TokenizerDelim.cpp: 0.00%
src/TokenizerFwf.cpp: 0.00%
src/TokenizerLine.h: 0.00%
src/TokenizerLog.h: 0.00%
src/TokenizerWs.cpp: 0.00%
src/unicode_fopen.h: 0.00%

[chainsawriot]

• [x] guess_header_ can be removed

[chainsawriot]

• [x] utctime_ can be removed

[chainsawriot]

• [x] remove this

https://github.com/chainsawriot/minty/blob/2b5347b2a19b1447de0fc853df4a543f8a86ef9c/R/type_convert.R#L14-L16