util: Drop ancient Intel CPU detection

We don't use it for anything.

Cc: mesa-stable # 24.3
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Yonggang Luo <luoyonggang@gmail.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
(cherry picked from commit ca947e1295)

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32261>

.pick_status.json

@@ -264,7 +264,7 @@
         "description": "util: Drop ancient Intel CPU detection",
         "nominated": true,
         "nomination_type": 1,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": null,
         "notes": null

src/util/u_cpu_detect.c

@@ -923,11 +923,6 @@ _util_cpu_detect_once(void)
          }
       }
 
-      if (regs[1] == 0x756e6547 && regs[2] == 0x6c65746e && regs[3] == 0x49656e69) {
-         /* GenuineIntel */
-         util_cpu_caps.has_intel = 1;
-      }
-
       cpuid(0x80000000, regs);
 
       if (regs[0] >= 0x80000001) {

src/util/u_cpu_detect.h

@@ -87,7 +87,6 @@ struct util_cpu_caps_t {
    int x86_cpu_type;
    unsigned cacheline;
 
-   unsigned has_intel:1;
    unsigned has_sse:1;
    unsigned has_sse2:1;
    unsigned has_sse3:1;