[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/tools/llvm-symbolizer/print_context.c b/llvm/test/tools/llvm-symbolizer/print_context.c
index f1860e9..3fd881c 100644
--- a/llvm/test/tools/llvm-symbolizer/print_context.c
+++ b/llvm/test/tools/llvm-symbolizer/print_context.c
@@ -1,6 +1,6 @@
 // REQUIRES: x86_64-linux
 // RUN: %host_cc -O0 -g %s -o %t 2>&1
-// RUN: %t 2>&1 | llvm-symbolizer -print-source-context-lines=5 -obj=%t | FileCheck %s --check-prefix=CHECK
+// RUN: %t 2>&1 | llvm-symbolizer -print-source-context-lines=5 -obj=%t | FileCheck %s
 
 #include <stdio.h>