[NFC][Clang] Fix static analyzer concerns

Remove unnecessary checks since they are checking that an unsigned
number >= 0, which is always true.

Author: Fznamznon

clang/lib/Basic/Targets/AMDGPU.h

@@ -119,7 +119,6 @@ class LLVM_LIBRARY_VISIBILITY AMDGPUTargetInfo final : public TargetInfo {
              (isTargetAddressSpace(A) &&
               toTargetAddressSpace(A) == llvm::AMDGPUAS::FLAT_ADDRESS)) &&
             isTargetAddressSpace(B) &&
-            toTargetAddressSpace(B) >= llvm::AMDGPUAS::FLAT_ADDRESS &&
             toTargetAddressSpace(B) <= llvm::AMDGPUAS::PRIVATE_ADDRESS &&
             toTargetAddressSpace(B) != llvm::AMDGPUAS::REGION_ADDRESS);
   }

clang/lib/Basic/Targets/NVPTX.h

@@ -99,7 +99,6 @@ class LLVM_LIBRARY_VISIBILITY NVPTXTargetInfo : public TargetInfo {
               toTargetAddressSpace(A) ==
                   llvm::NVPTXAS::ADDRESS_SPACE_GENERIC)) &&
             isTargetAddressSpace(B) &&
-            toTargetAddressSpace(B) >= llvm::NVPTXAS::ADDRESS_SPACE_GENERIC &&
             toTargetAddressSpace(B) <= llvm::NVPTXAS::ADDRESS_SPACE_LOCAL &&
             toTargetAddressSpace(B) != 2);
   }