[AArch64] Regenerate abds/abdu tests to remove x86 copy+pasta. NFC

Author: RKSimon

llvm/test/CodeGen/AArch64/abds-neg.ll

@@ -598,6 +598,3 @@ declare i8 @llvm.smin.i8(i8, i8)
 declare i16 @llvm.smin.i16(i16, i16)
 declare i32 @llvm.smin.i32(i32, i32)
 declare i64 @llvm.smin.i64(i64, i64)
-;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
-; X64: {{.*}}
-; X86: {{.*}}

llvm/test/CodeGen/AArch64/abds.ll

@@ -587,6 +587,3 @@ declare i8 @llvm.smin.i8(i8, i8)
 declare i16 @llvm.smin.i16(i16, i16)
 declare i32 @llvm.smin.i32(i32, i32)
 declare i64 @llvm.smin.i64(i64, i64)
-;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
-; X64: {{.*}}
-; X86: {{.*}}

llvm/test/CodeGen/AArch64/abdu-neg.ll

@@ -441,6 +441,3 @@ declare i8 @llvm.umin.i8(i8, i8)
 declare i16 @llvm.umin.i16(i16, i16)
 declare i32 @llvm.umin.i32(i32, i32)
 declare i64 @llvm.umin.i64(i64, i64)
-;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
-; X64: {{.*}}
-; X86: {{.*}}

llvm/test/CodeGen/AArch64/abdu.ll

@@ -424,6 +424,3 @@ declare i8 @llvm.umin.i8(i8, i8)
 declare i16 @llvm.umin.i16(i16, i16)
 declare i32 @llvm.umin.i32(i32, i32)
 declare i64 @llvm.umin.i64(i64, i64)
-;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
-; X64: {{.*}}
-; X86: {{.*}}