intel/perf: Remove i915_drm.h include from gen_perf.py

The generated file don't use any symbol in i915_drm.h

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/gen_perf.py

@@ -821,8 +821,6 @@ def main():
         #include <stdint.h>
         #include <stdbool.h>
 
-        #include <drm-uapi/i915_drm.h>
-
         #include "util/hash_table.h"
         #include "util/ralloc.h"