1 files changed, 0 insertions, 47 deletions
diff --git a/lib/net/imap/data_encoding.rb b/lib/net/imap/data_encoding.rb
deleted file mode 100644
index d8449f582c..0000000000
--- a/lib/net/imap/data_encoding.rb
+++ /dev/null
@@ -1,47 +0,0 @@
-# frozen_string_literal: true
-
-module Net
-  class IMAP < Protocol
-
-    # Decode a string from modified UTF-7 format to UTF-8.
-    #
-    # UTF-7 is a 7-bit encoding of Unicode [UTF7].  IMAP uses a
-    # slightly modified version of this to encode mailbox names
-    # containing non-ASCII characters; see [IMAP] section 5.1.3.
-    #
-    # Net::IMAP does _not_ automatically encode and decode
-    # mailbox names to and from UTF-7.
-    def self.decode_utf7(s)
-      return s.gsub(/&([^-]+)?-/n) {
-        if $1
-          ($1.tr(",", "/") + "===").unpack1("m").encode(Encoding::UTF_8, Encoding::UTF_16BE)
-        else
-          "&"
-        end
-      }
-    end
-
-    # Encode a string from UTF-8 format to modified UTF-7.
-    def self.encode_utf7(s)
-      return s.gsub(/(&)|[^\x20-\x7e]+/) {
-        if $1
-          "&-"
-        else
-          base64 = [$&.encode(Encoding::UTF_16BE)].pack("m0")
-          "&" + base64.delete("=").tr("/", ",") + "-"
-        end
-      }.force_encoding("ASCII-8BIT")
-    end
-
-    # Formats +time+ as an IMAP-style date.
-    def self.format_date(time)
-      return time.strftime('%d-%b-%Y')
-    end
-
-    # Formats +time+ as an IMAP-style date-time.
-    def self.format_datetime(time)
-      return time.strftime('%d-%b-%Y %H:%M %z')
-    end
-
-  end
-end