Remove electric behavior for end keyword

Correctly indentint on "end" keyword seems very hard,
it is simpler to remove it. And we already insert "end"
in ruby-insert-on-new-line hook, so the removal shouldn't
hurt too much.

rc/filetype/ruby.kak

@@ -156,7 +156,6 @@ define-command -hidden ruby-indent-on-char %{
         try %{ execute-keys -draft <a-x> <a-k> ^ \h * (elsif)  $ <ret> <a-a> i <a-semicolon> <a-?> ^ \h * (if)                                                    <ret> <a-S> 1<a-&> }
         try %{ execute-keys -draft <a-x> <a-k> ^ \h * (when)   $ <ret> <a-a> i <a-semicolon> <a-?> ^ \h * (case)                                                  <ret> <a-S> 1<a-&> }
         try %{ execute-keys -draft <a-x> <a-k> ^ \h * (rescue) $ <ret> <a-a> i <a-semicolon> <a-?> ^ \h * (begin|def)                                             <ret> <a-S> 1<a-&> }
-        try %{ execute-keys -draft <a-x> <a-k> ^ \h * (end)    $ <ret> <a-a> i <a-semicolon> <a-?> ^ \h * (begin|case|class|def|for|if|module|unless|until|while) <ret> <a-S> 1<a-&> }
     }
 }
 

test/regression/4086-ruby-deindenting-other-lines-than-keywords/cmd

@@ -0,0 +1 @@
+c<space><space>end

test/regression/4086-ruby-deindenting-other-lines-than-keywords/in

@@ -0,0 +1,6 @@
+class MyClass
+  def method
+%( )
+
+  expression
+end

test/regression/4086-ruby-deindenting-other-lines-than-keywords/out

@@ -0,0 +1,6 @@
+class MyClass
+  def method
+  end
+
+  expression
+end

test/regression/4086-ruby-deindenting-other-lines-than-keywords/rc

@@ -0,0 +1,3 @@
+source "%val{runtime}/colors/default.kak"
+source "%val{runtime}/rc/filetype/ruby.kak"
+set buffer filetype ruby