FP4: Don't override TARGET_DEVICE

This matches stock configuration

Change-Id: I4d9fd73bc199ffa93ebaa04745052d23f1e95c7d
diff --git a/lineage_FP4.mk b/lineage_FP4.mk
index c991bfd..7972959 100644
--- a/lineage_FP4.mk
+++ b/lineage_FP4.mk
@@ -28,7 +28,6 @@
 BUILD_FINGERPRINT := "Fairphone/FP4eea/FP4:11/RKQ1.210503.001/FP3R:user/release-keys"
 
 PRODUCT_BUILD_PROP_OVERRIDES += \
-    TARGET_DEVICE=FP4eea \
     TARGET_PRODUCT=FP4eea \
     PRIVATE_BUILD_DESC="qssi-user 11 RKQ1.210503.001 FP3R release-keys"