[LLVM] Remove unwanted --check-prefix=CHECK from unit tests. NFC.

Summary: Removed unwanted --check-prefix=CHECK from numerous unit tests.

Reviewers: t.p.northover, dblaikie, uweigand, MatzeB, tstellarAMD, mcrosier

Subscribers: mcrosier, dsanders

Differential Revision: http://reviews.llvm.org/D19279

llvm-svn: 266834
diff --git a/llvm/test/CodeGen/ARM/zero-cycle-zero.ll b/llvm/test/CodeGen/ARM/zero-cycle-zero.ll
index 4e8696f..2022d88 100644
--- a/llvm/test/CodeGen/ARM/zero-cycle-zero.ll
+++ b/llvm/test/CodeGen/ARM/zero-cycle-zero.ll
@@ -1,5 +1,5 @@
 ; RUN: llc -mtriple=armv8 -mcpu=cyclone < %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NOTSWIFT
-; RUN: llc -mtriple=armv8 -mcpu=swift < %s | FileCheck %s --check-prefix=CHECK
+; RUN: llc -mtriple=armv8 -mcpu=swift < %s | FileCheck %s
 ; RUN: llc -mtriple=armv8 -mcpu=cortex-a57 < %s | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-NOTSWIFT
 
 declare arm_aapcs_vfpcc void @take_vec64(<2 x i32>)