ART: Remove old code

Remove unused Quick compiler flag.

Remove support for arm32 soft-float code (which is no longer
supported by our compiler).

Test: m
Change-Id: I38b16291d90094dbf26776923a46afbf8de53f20
diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index 73b0fa2..e128a15 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -434,9 +434,9 @@
 }
 
 static bool IsInstructionSetSupported(InstructionSet instruction_set) {
-  return (instruction_set == kArm && !kArm32QuickCodeUseSoftFloat)
+  return instruction_set == kArm
       || instruction_set == kArm64
-      || (instruction_set == kThumb2 && !kArm32QuickCodeUseSoftFloat)
+      || instruction_set == kThumb2
       || instruction_set == kMips
       || instruction_set == kMips64
       || instruction_set == kX86