Revert "Fix the KNOWN_CODENAMES to include "L"."

This reverts commit c4517b0fbdb09dba4d9faf4e578a05df68dfe1c3.

Reason for revert: The CL is considered a culprit of b/315384164

Change-Id: I47479cad38f2337e68e14a5e31bd9bc26d948b94
diff --git a/core/version_util.mk b/core/version_util.mk
index 103b64e..dfa0277 100644
--- a/core/version_util.mk
+++ b/core/version_util.mk
@@ -100,7 +100,7 @@
 PLATFORM_VERSION_KNOWN_CODENAMES := \
 Base Base11 Cupcake Donut Eclair Eclair01 EclairMr1 Froyo Gingerbread GingerbreadMr1 \
 Honeycomb HoneycombMr1 HoneycombMr2 IceCreamSandwich IceCreamSandwichMr1 \
-JellyBean JellyBeanMr1 JellyBeanMr2 Kitkat KitkatWatch L Lollipop LollipopMr1 M N NMr1 O OMr1 P \
+JellyBean JellyBeanMr1 JellyBeanMr2 Kitkat KitkatWatch Lollipop LollipopMr1 M N NMr1 O OMr1 P \
 Q R S Sv2 Tiramisu UpsideDownCake VanillaIceCream
 
 # Convert from space separated list to comma separated