[mips] Remove android calling convention.

This calling convention was added just to handle functions which return vector
of floats. The fix committed in r165585 solves the problem.

llvm-svn: 176530
diff --git a/llvm/lib/Target/Mips/MipsSubtarget.cpp b/llvm/lib/Target/Mips/MipsSubtarget.cpp
index 75b4c98..e11e5d1 100644
--- a/llvm/lib/Target/Mips/MipsSubtarget.cpp
+++ b/llvm/lib/Target/Mips/MipsSubtarget.cpp
@@ -33,7 +33,7 @@
   IsLinux(true), HasSEInReg(false), HasCondMov(false), HasSwap(false),
   HasBitCount(false), HasFPIdx(false),
   InMips16Mode(false), InMicroMipsMode(false), HasDSP(false), HasDSPR2(false),
-  IsAndroid(false), RM(_RM)
+  RM(_RM)
 {
   std::string CPUName = CPU;
   if (CPUName.empty())