Revert "Add BLAKE3 support in Digest"

Author: byroot

README.md

@@ -78,9 +78,6 @@ SHA2 family::
  SHA512
  SHA384
  SHA256
-BLAKE3::
-  As Digest::BLAKE3, producing a 256-bit digest.
-  See https://github.com/BLAKE3-team/BLAKE3.
 ```
 
 The latest versions of the FIPS publications can be found here: http://csrc.nist.gov/publications/PubsFIPS.html.

Rakefile

@@ -24,7 +24,7 @@ if RUBY_ENGINE == "jruby"
 else
   require "rake/extensiontask"
   Rake::ExtensionTask.new("digest")
-  %w[bubblebabble md5 rmd160 sha1 sha2 crc32 blake3].each do |ext|
+  %w[bubblebabble md5 rmd160 sha1 sha2 crc32].each do |ext|
     Rake::ExtensionTask.new("digest/#{ext}")
   end
 end

digest.gemspec

@@ -37,9 +37,6 @@ Gem::Specification.new do |spec|
     spec.extensions = Dir["ext/digest/**/extconf.rb"]
 
     spec.files += Dir["ext/digest/**/{*.{rb,c,h,sh},depend}"]
-    # Vendored third-party license files (e.g. BLAKE3's LICENSE_*), which
-    # carry no filename extension and are missed by the glob above.
-    spec.files += Dir["ext/digest/**/LICENSE*"]
     spec.require_paths = %w[lib]
   end