[profile][test] Delete --path-equivalence=/tmp,%S

This causes the test to fail if %S is under /tmp

Author: MaskRay

compiler-rt/test/profile/Linux/instrprof-comdat.test

@@ -2,5 +2,5 @@ RUN: mkdir -p %t.d
 RUN: %clangxx_profgen -o %t.d/comdat -fcoverage-mapping -fuse-ld=gold %S/../Inputs/instrprof-comdat-1.cpp %S/../Inputs/instrprof-comdat-2.cpp
 RUN: LLVM_PROFILE_FILE=%t-comdat.profraw %run %t.d/comdat
 RUN: llvm-profdata merge -o %t.d/comdat.prof %t-comdat.profraw 
-RUN: llvm-cov show --path-equivalence=/tmp,%S --instr-profile=%t.d/comdat.prof %t.d/comdat | FileCheck --check-prefix=HEADER %S/../Inputs/instrprof-comdat.h
+RUN: llvm-cov show --instr-profile=%t.d/comdat.prof %t.d/comdat | FileCheck --check-prefix=HEADER %S/../Inputs/instrprof-comdat.h