Remove unnecessary unit test dependencies.

Summary: This is to address comment on D69409.

Reviewers: davidxl, thakis

Subscribers: mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69568

Author: hjyamauchi

llvm/unittests/Target/X86/CMakeLists.txt

@@ -6,11 +6,7 @@ include_directories(
 set(LLVM_LINK_COMPONENTS
   Analysis
   CodeGen
-  Core
-  GlobalISel
-  MC
   MIRParser
-  SelectionDAG
   Support
   Target
   X86CodeGen