Do not select USE_BLOBS

The `USE_BLOBS` config only exists for idealistic reasons. If we would
allow us to use blobs by default, we wouldn't need that option and could
just always do it. It's generally debatable for the project as a whole,
but not per board/subject.

Change-Id: I8591862699aef02e5a4ede32655fc82c44c97555
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39884
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/pcengines/apu2/Kconfig

@@ -26,7 +26,6 @@ config BOARD_SPECIFIC_OPTIONS
 	select HAVE_MP_TABLE
 	select HAVE_ACPI_TABLES
 	select BOARD_ROMSIZE_KB_8192
-	select USE_BLOBS
 	select GENERIC_SPD_BIN
 	select MAINBOARD_HAS_LPC_TPM
 	select SEABIOS_ADD_SERCON_PORT_FILE if PAYLOAD_SEABIOS

src/mainboard/system76/lemp9/Kconfig

@@ -19,7 +19,6 @@ config BOARD_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_BLOCK_HDA_VERB
 	select SPD_READ_BY_WORD
 	select SYSTEM_TYPE_LAPTOP
-	select USE_BLOBS
 	select USE_LEGACY_8254_TIMER # Fix failure to boot GRUB
 
 config MAINBOARD_DIR

src/mainboard/up/squared/Kconfig

@@ -2,7 +2,6 @@ if BOARD_UP_SQUARED
 
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
-	select USE_BLOBS
 	select HAVE_ACPI_TABLES
 	select HAVE_ACPI_RESUME
 	select INTEL_GMA_HAVE_VBT

src/security/intel/stm/Kconfig

@@ -3,7 +3,6 @@ config STM
 	default n
 	depends on ENABLE_VMX
 	depends on SMM_TSEG
-	select USE_BLOBS
 
 	help
 	  Enabling the STM will load a simple hypervisor into SMM that will