Redact electric-fence

Closes Homebrew/homebrew#31203.

Formula/electric-fence.rb

@@ -1,57 +0,0 @@
-require 'formula'
-
-class ElectricFence < Formula
-  homepage 'http://perens.com/FreeSoftware/ElectricFence/'
-  url 'http://perens.com/FreeSoftware/ElectricFence/electric-fence_2.1.13-0.1.tar.gz'
-  version '2.1.13-0.1'
-  sha1 'e6765bcb1543272040b806eea706fc7ae9b60524'
-
-  # Patch based on this MacPorts port: https://trac.macports.org/ticket/23836
-  # Discussion on how to port it to OS X: http://lists.apple.com/archives/xcode-users/2005/Oct/msg00791.html
-  patch :DATA
-
-  def install
-    system "make"
-    lib.install "libefence.a"
-    man3.install "libefence.3"
-  end
-
-  test do
-    (testpath/'test1.c').write <<-EOS.undent
-       #include <stdlib.h>
-       int main() {
-          int *arr = (int*)malloc(sizeof(int) * 10);
-          arr[10] = 1000;
-          return 0;
-       }
-    EOS
-    #{ENV.cc}, (testpath/'test1.c'), '-lefence'
-  end
-end
-
-__END__
-diff --git a/Makefile b/Makefile
-index 660f586..82054b9 100644
---- a/Makefile
-+++ b/Makefile
-@@ -4,7 +4,7 @@ AR= ar
- INSTALL= install
- MV= mv
- CHMOD= chmod
--CFLAGS= -g
-+CFLAGS= -g -DPAGE_PROTECTION_VIOLATED_SIGNAL=SIGBUS
- LIB_INSTALL_DIR= /usr/lib
- MAN_INSTALL_DIR= /usr/man/man3
-
-diff --git a/page.c b/page.c
-index 07ac9d5..69374c4 100644
---- a/page.c
-+++ b/page.c
-@@ -30,7 +30,7 @@
- static caddr_t	startAddr = (caddr_t) 0;
-
- #if ( !defined(sgi) && !defined(_AIX) )
--extern int	sys_nerr;
-+/*extern int	sys_nerr;*/
- /*extern char *	sys_errlist[];*/
- #endif