Revert of [stubs] Introduce LeftShift, SignedRightShift and UnsignedRightShift stubs.

src/compiler/code-stub-assembler.cc

Index: src/compiler/code-stub-assembler.cc
diff --git a/src/compiler/code-stub-assembler.cc b/src/compiler/code-stub-assembler.cc
index 1da2fdd679186f5e237325e2094c90ee39f2f649..425f6bee7d5969fedb77a0ea8f47c38b1b7b4a80 100644
--- a/src/compiler/code-stub-assembler.cc
+++ b/src/compiler/code-stub-assembler.cc
@@ -879,41 +879,6 @@
     var_result.Bind(result);
   }
   Goto(&if_join);
-  Bind(&if_join);
-  return var_result.value();
-}
-
-Node* CodeStubAssembler::ChangeUint32ToTagged(Node* value) {
-  Label if_overflow(this, Label::kDeferred), if_not_overflow(this),
-      if_join(this);
-  Variable var_result(this, MachineRepresentation::kTagged);
-  // If {value} > 2^31 - 1, we need to store it in a HeapNumber.
-  Branch(Int32LessThan(value, Int32Constant(0)), &if_overflow,
-         &if_not_overflow);
-  Bind(&if_not_overflow);
-  {
-    if (raw_assembler_->machine()->Is64()) {
-      var_result.Bind(SmiTag(ChangeUint32ToUint64(value)));
-    } else {
-      // If tagging {value} results in an overflow, we need to use a HeapNumber
-      // to represent it.
-      Node* pair = Int32AddWithOverflow(value, value);
-      Node* overflow = Projection(1, pair);
-      GotoIf(overflow, &if_overflow);
-
-      Node* result = Projection(0, pair);
-      var_result.Bind(result);
-    }
-  }
-  Goto(&if_join);
-
-  Bind(&if_overflow);
-  {
-    Node* float64_value = ChangeUint32ToFloat64(value);
-    var_result.Bind(AllocateHeapNumberWithValue(float64_value));
-  }
-  Goto(&if_join);
-
   Bind(&if_join);
   return var_result.value();
 }