[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-attr6.ll b/llvm/test/CodeGen/ARM/build-attributes-fn-attr6.ll
index 57443b0..554b72c 100644
--- a/llvm/test/CodeGen/ARM/build-attributes-fn-attr6.ll
+++ b/llvm/test/CodeGen/ARM/build-attributes-fn-attr6.ll
@@ -4,7 +4,7 @@
 ; functions have consistent function attributes values. Here we check two
 ; functions have inconsistent values, and that a default is returned. 
 
-; 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, 1