AMDGPU: Remove Feature64BitPtr

This is a leftover from AMDIL that doesn't do anything
and doesn't belong here.

llvm-svn: 258606
diff --git a/llvm/lib/Target/AMDGPU/AMDGPU.td b/llvm/lib/Target/AMDGPU/AMDGPU.td
index 5ef9e0c..9285085 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPU.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPU.td
@@ -73,11 +73,6 @@
         "true",
         "Enable single precision denormal handling">;
 
-def Feature64BitPtr : SubtargetFeature<"64BitPtr",
-        "Is64bit",
-        "true",
-        "Specify if 64-bit addressing should be used">;
-
 def FeatureR600ALUInst : SubtargetFeature<"R600ALUInst",
         "R600ALUInst",
         "false",
@@ -247,17 +242,17 @@
 >;
 
 def FeatureSouthernIslands : SubtargetFeatureGeneration<"SOUTHERN_ISLANDS",
-        [Feature64BitPtr, FeatureFP64, FeatureLocalMemorySize32768,
+        [FeatureFP64, FeatureLocalMemorySize32768,
          FeatureWavefrontSize64, FeatureGCN, FeatureGCN1Encoding,
          FeatureLDSBankCount32]>;
 
 def FeatureSeaIslands : SubtargetFeatureGeneration<"SEA_ISLANDS",
-        [Feature64BitPtr, FeatureFP64, FeatureLocalMemorySize65536,
+        [FeatureFP64, FeatureLocalMemorySize65536,
          FeatureWavefrontSize64, FeatureGCN, FeatureFlatAddressSpace,
          FeatureGCN1Encoding, FeatureCIInsts]>;
 
 def FeatureVolcanicIslands : SubtargetFeatureGeneration<"VOLCANIC_ISLANDS",
-        [Feature64BitPtr, FeatureFP64, FeatureLocalMemorySize65536,
+        [FeatureFP64, FeatureLocalMemorySize65536,
          FeatureWavefrontSize64, FeatureFlatAddressSpace, FeatureGCN,
          FeatureGCN3Encoding, FeatureCIInsts, FeatureLDSBankCount32]>;