update comments as well

Author: kkent030315

lld/COFF/DriverUtils.cpp

@@ -253,8 +253,7 @@ void LinkerDriver::parseDosStub(StringRef path) {
   const char *bufferStart = stub->getBufferStart();
   // MS link.exe compatibility:
   // 1. stub must be greater than or equal to 64 bytes
-  // 2. stub must be 8-byte aligned
-  // 3. stub must be start with a valid dos signature 'MZ'
+  // 2. stub must be start with a valid dos signature 'MZ'
   if (bufferSize < 0x40)
     Err(ctx) << "/stub: stub must be greater than or equal to 64 bytes: "
              << path;