get rid of DTAS.dedupe_str wrapper

Ruby 2.3+ supports String#@-, though it did not deduplicate
strings.  But 2.5 is already old at this point and most users
can be expected to have it.

This gives some memory regressions for Ruby <= 2.4 users,
but cuts down on the code we maintain and reduces bytecode
overhead for 2.5+ users.

1 files changed, 0 insertions, 13 deletions

diff --git a/lib/dtas.rb b/lib/dtas.rb
index eb8f49d..477a176 100644
--- a/lib/dtas.rb
+++ b/lib/dtas.rb
@@ -25,19 +25,6 @@ module DTAS
       Fiddle.dlopen(nil)
     end
   end
-
-  # String#-@ will deduplicate strings when Ruby 2.5 is released (Dec 2017)
-  # https://bugs.ruby-lang.org/issues/13077
-  if RUBY_VERSION.to_f >= 2.5
-    def self.dedupe_str(str)
-      -str
-    end
-  else
-    # Ruby 2.1 - 2.4, noop for older Rubies
-    def self.dedupe_str(str)
-      eval "#{str.inspect}.freeze"
-    end
-  end
   # :startdoc:
 end