kbuild: remove unneeded comments and code from scripts/basic/Makefile

Kbuild descends into scripts/basic/ even before the Kconfig.
I do not expect any other host programs added to this Makefile.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

scripts/basic/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
-###
-# This Makefile lists the most basic programs used during the build process.
-# The programs listed herein are what are needed to do the basic stuff,
-# such as fix file dependencies.
-# This initial step is needed to avoid files to be recompiled
-# when kernel configuration changes (which is what happens when
-# .config is included by main Makefile.
-# ---------------------------------------------------------------------------
-# fixdep: 	 Used to generate dependency information during build process
+#
+# fixdep: used to generate dependency information during build process
 
 hostprogs-y	:= fixdep
 always		:= $(hostprogs-y)
-
-# fixdep is needed to compile other host programs
-$(addprefix $(obj)/,$(filter-out fixdep,$(always))): $(obj)/fixdep