[WebAssembly] Remove an obsolete comment.

llvm-svn: 321127
diff --git a/llvm/lib/MC/WasmObjectWriter.cpp b/llvm/lib/MC/WasmObjectWriter.cpp
index 6e76c5f..f35c47b 100644
--- a/llvm/lib/MC/WasmObjectWriter.cpp
+++ b/llvm/lib/MC/WasmObjectWriter.cpp
@@ -1132,8 +1132,7 @@
         Import.IsMutable = false;
         SymbolIndices[&WS] = NumGlobalImports;
 
-        // If this global is the stack pointer, make it mutable and remember it
-        // so that we can emit metadata for it.
+        // If this global is the stack pointer, make it mutable.
         if (WS.getName() == "__stack_pointer")
           Import.IsMutable = true;