[PowerPC][XCOFF] Remove basic test. [NFC]

Test verified that we could compile an empty module and produce an XCOFF
object file. Newer tests superssed this coverage, its safe to remove.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@371247 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/PowerPC/aix-xcoff-basic.ll

@@ -1,37 +0,0 @@
-; RUN: llc -mtriple powerpc-ibm-aix-xcoff -filetype=obj -o %t.o < %s
-; RUN: llvm-readobj --file-headers %t.o | FileCheck %s
-
-; RUN: not llc -mtriple powerpc64-ibm-aix-xcoff -filetype=obj < %s 2>&1 | \
-; RUN: FileCheck --check-prefix=64BIT %s
-
-; RUN: llc -mtriple powerpc-ibm-aix-xcoff < %s | \
-; RUN: FileCheck --check-prefix=ASM %s
-
-; RUN: llc -mtriple powerpc64-ibm-aix-xcoff < %s | \
-; RUN: FileCheck --check-prefix=ASM %s
-
-target datalayout = "E-m:e-p:32:32-i64:64-n32"
-target triple = "powerpc-unknown-aix"
-
-; NOTE: The object file output and the assembly file output do not describe the
-;       same abstract XCOFF content due to the limited amount of functionality
-;       implemented.
-
-; CHECK:      Format: aixcoff-rs6000
-; CHECK-NEXT: Arch: powerpc
-; CHECK-NEXT: AddressSize: 32bit
-; CHECK-NEXT: FileHeader {
-; CHECK-NEXT:   Magic: 0x1DF
-; CHECK-NEXT:   NumberOfSections: 0
-; CHECK-NEXT:   TimeStamp: None (0x0)
-; CHECK-NEXT:   SymbolTableOffset: 0x0
-; CHECK-NEXT:   SymbolTableEntries: 0
-; CHECK-NEXT:   OptionalHeaderSize: 0x0
-; CHECK-NEXT:   Flags: 0x0
-; CHECK-NEXT: }
-
-; 64BIT: LLVM ERROR: 64-bit XCOFF object files are not supported yet.
-
-; The csect does not need to be present, but LLVM's default behavior when
-; emitting asm is to start the file with the .text section.
-; ASM: .csect .text[PR]