apcupsd: remove old fix

Formula/apcupsd.rb

@@ -53,7 +53,7 @@ class Apcupsd < Formula
   end
 
   def caveats
-    s = <<~EOS
+    <<~EOS
       For #{name} to be able to communicate with UPSes connected via USB,
       the kernel extension must be installed by the root user:
 
@@ -61,20 +61,12 @@ class Apcupsd < Formula
         sudo chown -R root:wheel /System/Library/Extensions/ApcupsdDummy.kext
         sudo touch /System/Library/Extensions/
 
-    EOS
-
-    if MacOS.version >= :el_capitan
-      s += <<~EOS
         Note: On OS X El Capitan and above, the kernel extension currently
         does not work as expected.
 
         You will have to unplug and plug the USB cable back in after each
         reboot in order for #{name} to be able to connect to the UPS.
 
-      EOS
-    end
-
-    s += <<~EOS
       To load #{name} at startup, activate the included Launch Daemon:
 
         sudo cp #{prefix}/lib/Library/LaunchDaemons/org.apcupsd.apcupsd.plist /Library/LaunchDaemons
@@ -87,8 +79,6 @@ class Apcupsd < Formula
         sudo launchctl unload -w /Library/LaunchDaemons/org.apcupsd.apcupsd.plist
         sudo rm /Library/LaunchDaemons/org.apcupsd.apcupsd.plist
     EOS
-
-    s
   end
 
   test do