switch editors/* to embedded-in-source kbuild system

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

editors/Config.src

@@ -7,51 +7,6 @@ menu "Editors"
 
 INSERT
 
-config CMP
-	bool "cmp"
-	default y
-	help
-	  cmp is used to compare two files and returns the result
-	  to standard output.
-
-config DIFF
-	bool "diff"
-	default y
-	help
-	  diff compares two files or directories and outputs the
-	  differences between them in a form that can be given to
-	  the patch command.
-
-config FEATURE_DIFF_LONG_OPTIONS
-	bool "Enable long options"
-	default y
-	depends on DIFF && LONG_OPTS
-	help
-	  Enable use of long options.
-
-config FEATURE_DIFF_DIR
-	bool "Enable directory support"
-	default y
-	depends on DIFF
-	help
-	  This option enables support for directory and subdirectory
-	  comparison.
-
-config ED
-	bool "ed"
-	default y
-	help
-	  The original 1970's Unix text editor, from the days of teletypes.
-	  Small, simple, evil. Part of SUSv3. If you're not already using
-	  this, you don't need it.
-
-config SED
-	bool "sed"
-	default y
-	help
-	  sed is used to perform text transformations on a file
-	  or input from a pipeline.
-
 config FEATURE_ALLOW_EXEC
 	bool "Allow vi and awk to execute shell commands"
 	default y