intel/perf: Nuke platform_supported

Only set, never used.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28997>

src/intel/perf/intel_perf.c

@@ -765,8 +765,6 @@ oa_metrics_available(struct intel_perf_config *perf, int fd,
          if (paranoid == 0 || geteuid() == 0)
             i915_perf_oa_available = true;
       }
-
-      perf->platform_supported = oa_register != NULL;
    }
 
    return i915_perf_oa_available &&

src/intel/perf/intel_perf.h

@@ -386,12 +386,6 @@ struct intel_perf_config {
     */
    uint64_t fallback_raw_oa_metric;
 
-   /* Whether we have support for this platform. If true && n_queries == 0,
-    * this means we will not be able to use i915-perf because of it is in
-    * paranoid mode.
-    */
-   bool platform_supported;
-
    /* Location of the device's sysfs entry. */
    char sysfs_dev_dir[256];