diff --git a/patches/ruby/2.2.2/railsexpress/04-backport-20ef4699e510f89ad4e9ccbeafa2d3d725ed2d3c.patch b/patches/ruby/2.2.2/railsexpress/04-backport-20ef4699e510f89ad4e9ccbeafa2d3d725ed2d3c.patch
deleted file mode 100644
index 616bb25..0000000
--- a/patches/ruby/2.2.2/railsexpress/04-backport-20ef4699e510f89ad4e9ccbeafa2d3d725ed2d3c.patch
+++ /dev/null
@@ -1,48 +0,0 @@
-diff --git a/ext/-test-/string/nofree.c b/ext/-test-/string/nofree.c
-new file mode 100644
-index 0000000..d3d8071
---- /dev/null
-+++ b/ext/-test-/string/nofree.c
-@@ -0,0 +1,13 @@
-+#include "ruby.h"
-+
-+VALUE
-+bug_str_nofree(VALUE self)
-+{
-+    return rb_str_new_cstr("abcdef");
-+}
-+
-+void
-+Init_nofree(VALUE klass)
-+{
-+    rb_define_singleton_method(klass, "nofree", bug_str_nofree, 0);
-+}
-diff --git a/string.c b/string.c
-index 2652b29..1753b37 100644
---- a/string.c
-+++ b/string.c
-@@ -60,7 +60,7 @@ VALUE rb_cSymbol;
-     FL_SET((str), STR_NOEMBED);\
-     STR_SET_EMBED_LEN((str), 0);\
- } while (0)
--#define STR_SET_EMBED(str) FL_UNSET((str), STR_NOEMBED)
-+#define STR_SET_EMBED(str) FL_UNSET((str), (STR_NOEMBED|STR_NOFREE))
- #define STR_SET_EMBED_LEN(str, n) do { \
-     long tmp_n = (n);\
-     RBASIC(str)->flags &= ~RSTRING_EMBED_LEN_MASK;\
-diff --git a/test/-ext-/string/test_nofree.rb b/test/-ext-/string/test_nofree.rb
-new file mode 100644
-index 0000000..234c84d
---- /dev/null
-+++ b/test/-ext-/string/test_nofree.rb
-@@ -0,0 +1,10 @@
-+require 'test/unit'
-+
-+class Test_StringNoFree < Test::Unit::TestCase
-+  def test_no_memory_leak
-+    bug10942 = '[ruby-core:68436] [Bug #10942] no leak on nofree string'
-+    assert_no_memory_leak(%w(-r-test-/string/string), '',
-+                          '1000000.times {Bug::String.nofree << "a" * 100}',
-+                          bug10942, rss: true, limit: 2.0)
-+  end
-+end
diff --git a/patchsets/ruby/2.2.2/railsexpress b/patchsets/ruby/2.2.2/railsexpress
index ce7fdf6..c07722f 100644
--- a/patchsets/ruby/2.2.2/railsexpress
+++ b/patchsets/ruby/2.2.2/railsexpress
@@ -1,4 +1,3 @@
 railsexpress/01-zero-broken-tests.patch
 railsexpress/02-improve-gc-stats.patch
 railsexpress/03-display-more-detailed-stack-trace.patch
-railsexpress/04-backport-20ef4699e510f89ad4e9ccbeafa2d3d725ed2d3c.patch