Revert of Thread maybe-assigned through the bytecodes.

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index c0ff19ac77f2c413ed245ef796db19eb6811fe75..6f506446ec6bd4fbe9f4f7280098bc22d7bdb7f6 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -477,20 +477,12 @@
   return *this;
 }
 
-BytecodeArrayBuilder& BytecodeArrayBuilder::LoadContextSlot(
-    Register context, int slot_index, int depth,
-    ContextSlotMutability mutability) {
+BytecodeArrayBuilder& BytecodeArrayBuilder::LoadContextSlot(Register context,
+                                                            int slot_index,
+                                                            int depth) {
   if (context.is_current_context() && depth == 0) {
-    if (mutability == kImmutableSlot) {
-      OutputLdaImmutableCurrentContextSlot(slot_index);
-    } else {
-      DCHECK_EQ(kMutableSlot, mutability);
-      OutputLdaCurrentContextSlot(slot_index);
-    }
-  } else if (mutability == kImmutableSlot) {
-    OutputLdaImmutableContextSlot(context, slot_index, depth);
-  } else {
-    DCHECK_EQ(mutability, kMutableSlot);
+    OutputLdaCurrentContextSlot(slot_index);
+  } else {
     OutputLdaContextSlot(context, slot_index, depth);
   }
   return *this;