[OPENMP]Remove unused parameter, NFC.

Parameter CodeGenModule &CGM is not required for CGOpenMPRuntime member
functions, since class holds the reference to the CGM.

llvm-svn: 356480
diff --git a/clang/lib/CodeGen/CGDecl.cpp b/clang/lib/CodeGen/CGDecl.cpp
index 80bdede..8a871a0 100644
--- a/clang/lib/CodeGen/CGDecl.cpp
+++ b/clang/lib/CodeGen/CGDecl.cpp
@@ -2574,5 +2574,5 @@
 }
 
 void CodeGenModule::EmitOMPRequiresDecl(const OMPRequiresDecl *D) {
-  getOpenMPRuntime().checkArchForUnifiedAddressing(*this, D);
+  getOpenMPRuntime().checkArchForUnifiedAddressing(D);
 }