Remove mostly unused setters.

Most of the code was setting the TargetOptions directly.

llvm-svn: 228961
diff --git a/llvm/lib/Target/TargetMachineC.cpp b/llvm/lib/Target/TargetMachineC.cpp
index 8be10cb..537b47b 100644
--- a/llvm/lib/Target/TargetMachineC.cpp
+++ b/llvm/lib/Target/TargetMachineC.cpp
@@ -179,7 +179,7 @@
 
 void LLVMSetTargetMachineAsmVerbosity(LLVMTargetMachineRef T,
                                       LLVMBool VerboseAsm) {
-  unwrap(T)->setAsmVerbosityDefault(VerboseAsm);
+  unwrap(T)->Options.MCOptions.AsmVerbose = VerboseAsm;
 }
 
 static LLVMBool LLVMTargetMachineEmit(LLVMTargetMachineRef T, LLVMModuleRef M,