[cleanup] Drop unused Allocate*String MacroAssembler instructions

src/ppc/macro-assembler-ppc.h

Index: src/ppc/macro-assembler-ppc.h
diff --git a/src/ppc/macro-assembler-ppc.h b/src/ppc/macro-assembler-ppc.h
index 5ae59db1b146b20f34a8f8439aae5e0fea56a6c7..dac279376469591aaa80764871d29f6d64cda63c 100644
--- a/src/ppc/macro-assembler-ppc.h
+++ b/src/ppc/macro-assembler-ppc.h
@@ -712,25 +712,6 @@ class MacroAssembler : public Assembler {
   void FastAllocate(Register object_size, Register result, Register result_end,
                     Register scratch, AllocationFlags flags);
 
-  void AllocateTwoByteString(Register result, Register length,
-                             Register scratch1, Register scratch2,
-                             Register scratch3, Label* gc_required);
-  void AllocateOneByteString(Register result, Register length,
-                             Register scratch1, Register scratch2,
-                             Register scratch3, Label* gc_required);
-  void AllocateTwoByteConsString(Register result, Register length,
-                                 Register scratch1, Register scratch2,
-                                 Label* gc_required);
-  void AllocateOneByteConsString(Register result, Register length,
-                                 Register scratch1, Register scratch2,
-                                 Label* gc_required);
-  void AllocateTwoByteSlicedString(Register result, Register length,
-                                   Register scratch1, Register scratch2,
-                                   Label* gc_required);
-  void AllocateOneByteSlicedString(Register result, Register length,
-                                   Register scratch1, Register scratch2,
-                                   Label* gc_required);
-
   // Allocates a heap number or jumps to the gc_required label if the young
   // space is full and a scavenge is needed. All registers are clobbered also
   // when control continues at the gc_required label.
@@ -1404,11 +1385,6 @@ class MacroAssembler : public Assembler {
       Register first_object_instance_type, Register second_object_instance_type,
       Register scratch1, Register scratch2, Label* failure);
 
-  // Check if instance type is sequential one-byte string and jump to label if
-  // it is not.
-  void JumpIfInstanceTypeIsNotSequentialOneByte(Register type, Register scratch,
-                                                Label* failure);
-
   void JumpIfNotUniqueNameInstanceType(Register reg, Label* not_unique_name);
 
   void EmitSeqStringSetCharCheck(Register string, Register index,