Remove unnecessary APPLE specific code (#1188)

To reduce differences between tests, remove APPLE specific code from
unary tests as no other test have similar logic.

Ensure gMeasureTimes is consistently initialised regardless of operating
systems to ensure a consistent command line interface.

The remaining APPLE specific pieces of code relate either to include
paths, or to the implementation of PreventSleep(), ResumeSleep() and
GetTime(). Those are not removed in this commit.

Signed-off-by: Marco Antognini <marco.antognini@arm.com>

test_conformance/math_brute_force/unary_double.cpp

@@ -20,10 +20,6 @@
 
 #include <cstring>
 
-#if defined(__APPLE__)
-#include <sys/time.h>
-#endif
-
 static int BuildKernel(const char *name, int vectorSize, cl_uint kernel_count,
                        cl_kernel *k, cl_program *p, bool relaxedMode)
 {
@@ -166,12 +162,6 @@ int TestFunc_Double_Double(const Func *f, MTdata d, bool relaxedMode)
     size_t i, j;
     float maxError = 0.0f;
     double maxErrorVal = 0.0;
-#if defined(__APPLE__)
-    struct timeval time_val;
-    gettimeofday(&time_val, NULL);
-    double start_time = time_val.tv_sec + 1e-6 * time_val.tv_usec;
-    double end_time;
-#endif
 
     logFunctionInfo(f->name, sizeof(cl_double), relaxedMode);
     // Init test_info
@@ -302,12 +292,6 @@ int TestFunc_Double_Double(const Func *f, MTdata d, bool relaxedMode)
             vlog("passed");
     }
 
-
-#if defined(__APPLE__)
-    gettimeofday(&time_val, NULL);
-    end_time = time_val.tv_sec + 1e-6 * time_val.tv_usec;
-#endif
-
     if (gMeasureTimes)
     {
         // Init input array
@@ -385,10 +369,6 @@ int TestFunc_Double_Double(const Func *f, MTdata d, bool relaxedMode)
     }
 
     if (!gSkipCorrectnessTesting) vlog("\t%8.2f @ %a", maxError, maxErrorVal);
-
-#if defined(__APPLE__)
-    vlog("\t(%2.2f seconds)", end_time - start_time);
-#endif
     vlog("\n");
 
 exit: