rm Meson build

[weslleyspereira]

PR based on the discussion in #488 and, especially, #488 (comment)

deleted:    BLAS/SRC/meson.build
deleted:    SRC/meson.build
deleted:    meson.build
deleted:    meson_options.txt

[codecov]

Codecov Report

Merging #511 (c6e59df) into master (55bdf7f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #511   +/-   ##
=======================================
  Coverage   83.33%   83.33%           
=======================================
  Files        1820     1820           
  Lines      170893   170893           
=======================================
  Hits       142411   142411           
  Misses      28482    28482           

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