[llvm] Remove redundant --check-prefix=CHECK from tests

Reviewers: MatzeB, mcrosier, rengolin

Differential Revision: https://reviews.llvm.org/D25894

llvm-svn: 285003
diff --git a/llvm/test/CodeGen/ARM/build-attributes-fn-attr4.ll b/llvm/test/CodeGen/ARM/build-attributes-fn-attr4.ll
index 6d2faac..e97dd0a 100644
--- a/llvm/test/CodeGen/ARM/build-attributes-fn-attr4.ll
+++ b/llvm/test/CodeGen/ARM/build-attributes-fn-attr4.ll
@@ -4,7 +4,7 @@
 ; attributes values.
 ; Here we check the denormal-fp-math=positive-zero value.
 
-; RUN: llc < %s -mtriple=armv7-linux-gnueabi -mcpu=cortex-a15  | FileCheck %s --check-prefix=CHECK
+; RUN: llc < %s -mtriple=armv7-linux-gnueabi -mcpu=cortex-a15  | FileCheck %s
 
 ; CHECK: .eabi_attribute 20, 0