VM: Re-format to use at most one newline between functions

runtime/vm/assembler_arm64.h

Index: runtime/vm/assembler_arm64.h
diff --git a/runtime/vm/assembler_arm64.h b/runtime/vm/assembler_arm64.h
index 1b25c5bb0e89f9d4b54842d8ebc688358feed2c6..921fc7a8742d5125d116c2ac862a9a2c55d38a4f 100644
--- a/runtime/vm/assembler_arm64.h
+++ b/runtime/vm/assembler_arm64.h
@@ -41,7 +41,6 @@ class Immediate : public ValueObject {
   friend class Assembler;
 };
 
-
 class Label : public ValueObject {
  public:
   Label() : position_(0) {}
@@ -83,7 +82,6 @@ class Label : public ValueObject {
   DISALLOW_COPY_AND_ASSIGN(Label);
 };
 
-
 class Address : public ValueObject {
  public:
   Address(const Address& other)
@@ -299,7 +297,6 @@ class Address : public ValueObject {
   friend class Assembler;
 };
 
-
 class FieldAddress : public Address {
  public:
   FieldAddress(Register base, int32_t disp, OperandSize sz = kDoubleWord)
@@ -316,7 +313,6 @@ class FieldAddress : public Address {
   }
 };
 
-
 class Operand : public ValueObject {
  public:
   enum OperandType {
@@ -438,7 +434,6 @@ class Operand : public ValueObject {
   friend class Assembler;
 };
 
-
 class Assembler : public ValueObject {
  public:
   explicit Assembler(bool use_far_branches = false);