ARM64: Clean up support for explicit literal load.

src/arm64/constants-arm64.h

Index: src/arm64/constants-arm64.h
diff --git a/src/arm64/constants-arm64.h b/src/arm64/constants-arm64.h
index 46852b9b537ccd3aa72287f15d3b8e8392b9e411..f459b4b757625e6c6dae3fc39ae946e3beb30061 100644
--- a/src/arm64/constants-arm64.h
+++ b/src/arm64/constants-arm64.h
@@ -25,8 +25,7 @@ namespace internal {
 
 const unsigned kInstructionSize = 4;
 const unsigned kInstructionSizeLog2 = 2;
-const unsigned kLiteralEntrySize = 4;
-const unsigned kLiteralEntrySizeLog2 = 2;
+const unsigned kLoadLiteralScaleLog2 = 2;
 const unsigned kMaxLoadLiteralRange = 1 * MB;
 
 const unsigned kNumberOfRegisters = 32;