Revert "Add out-of-line constant pool support to Arm."

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index 5a00d44ea2c0fa6c2e2000049f45e50aed78802c..cfd991495df9256eaab1aa7d638f8a7688ccadb5 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -375,15 +375,6 @@ class RelocInfo BASE_EMBEDDED {
   }
   static inline int ModeMask(Mode mode) { return 1 << mode; }
 
-  // Returns true if the first RelocInfo has the same mode and raw data as the
-  // second one.
-  static inline bool IsEqual(RelocInfo first, RelocInfo second) {
-    return first.rmode() == second.rmode() &&
-           (first.rmode() == RelocInfo::NONE64 ?
-              first.raw_data64() == second.raw_data64() :
-              first.data() == second.data());
-  }
-
   // Accessors
   byte* pc() const { return pc_; }
   void set_pc(byte* pc) { pc_ = pc; }