[gn build] Remove unnecessary lld dependency on DebugInfo/Symbolize.

The gn script for lld's COFF lib adds an unnecessary dependency on llvm/lib/DebugInfo/Symbolize. There is no such dependency in lld/COFF/CMakeLists.txt. This can be safely removed.

Reviewed By: phosek, thakis

Differential Revision: https://reviews.llvm.org/D115554

llvm/utils/gn/secondary/lld/COFF/BUILD.gn

@@ -15,7 +15,6 @@ static_library("COFF") {
     "//llvm/lib/DebugInfo/CodeView",
     "//llvm/lib/DebugInfo/MSF",
     "//llvm/lib/DebugInfo/PDB",
-    "//llvm/lib/DebugInfo/Symbolize",
     "//llvm/lib/IR",
     "//llvm/lib/LTO",
     "//llvm/lib/MC",