Simplify. NFC.

We handled all undefined symbols before this.

llvm-svn: 312808
diff --git a/lld/ELF/Writer.cpp b/lld/ELF/Writer.cpp
index 7c53d2f..e12b675f3 100644
--- a/lld/ELF/Writer.cpp
+++ b/lld/ELF/Writer.cpp
@@ -1252,7 +1252,7 @@
 
   // -Bsymbolic means that definitions are not preempted.
   if (Config->Bsymbolic || (Config->BsymbolicFunctions && B.isFunc()))
-    return !B.isDefined();
+    return false;
   return true;
 }