ec/purism/librem: Remove unused Kconfig file

Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Change-Id: I0d8dff53d98ae70b72d1850d18fd6408d3293356
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62363
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Martin L Roth <martinroth@google.com>
diff --git a/src/ec/purism/librem/Kconfig b/src/ec/purism/librem/Kconfig
deleted file mode 100644
index 0ea38c6..0000000
--- a/src/ec/purism/librem/Kconfig
+++ /dev/null
@@ -1,4 +0,0 @@
-config EC_PURISM_LIBREM
-	bool
-	help
-	  Purism Librem EC