Quick Compiler: static, extern and inline cleanup

More declarations cleanup.  Some dead code removal. No logic changes.

Change-Id: Ife3d0426082f4eeae7c0010ceb92d7dbdc823c71
diff --git a/src/compiler/codegen/x86/target_x86.cc b/src/compiler/codegen/x86/target_x86.cc
index 64343e5..272554d 100644
--- a/src/compiler/codegen/x86/target_x86.cc
+++ b/src/compiler/codegen/x86/target_x86.cc
@@ -380,14 +380,14 @@
 }
 
 /* Clobber all regs that might be used by an external C call */
-extern void ClobberCalleeSave(CompilationUnit *cUnit)
+void ClobberCalleeSave(CompilationUnit *cUnit)
 {
   Clobber(cUnit, rAX);
   Clobber(cUnit, rCX);
   Clobber(cUnit, rDX);
 }
 
-extern RegLocation GetReturnWideAlt(CompilationUnit* cUnit) {
+RegLocation GetReturnWideAlt(CompilationUnit* cUnit) {
   RegLocation res = LocCReturnWide();
   CHECK(res.lowReg == rAX);
   CHECK(res.highReg == rDX);
@@ -399,7 +399,7 @@
   return res;
 }
 
-extern RegLocation GetReturnAlt(CompilationUnit* cUnit)
+RegLocation GetReturnAlt(CompilationUnit* cUnit)
 {
   RegLocation res = LocCReturn();
   res.lowReg = rDX;
@@ -408,14 +408,14 @@
   return res;
 }
 
-extern RegisterInfo* GetRegInfo(CompilationUnit* cUnit, int reg)
+RegisterInfo* GetRegInfo(CompilationUnit* cUnit, int reg)
 {
   return X86_FPREG(reg) ? &cUnit->regPool->FPRegs[reg & X86_FP_REG_MASK]
                     : &cUnit->regPool->coreRegs[reg];
 }
 
 /* To be used when explicitly managing register use */
-extern void LockCallTemps(CompilationUnit* cUnit)
+void LockCallTemps(CompilationUnit* cUnit)
 {
   LockTemp(cUnit, rX86_ARG0);
   LockTemp(cUnit, rX86_ARG1);
@@ -424,7 +424,7 @@
 }
 
 /* To be used when explicitly managing register use */
-extern void FreeCallTemps(CompilationUnit* cUnit)
+void FreeCallTemps(CompilationUnit* cUnit)
 {
   FreeTemp(cUnit, rX86_ARG0);
   FreeTemp(cUnit, rX86_ARG1);