[macOS-26] Update Xcode 26.2, remove Xcode 16.4 (actions#13391)

Author: erik-bershel

images/macos/toolsets/toolset-26.json

@@ -4,11 +4,11 @@
         "arm64":{
             "versions": [
                 {
-                    "link": "26.2_beta_2",
-                    "filename": "Xcode_26.2_beta_2_Universal",
-                    "version": "26.2_beta_2+17C5038g",
+                    "link": "26.2_Release_Candidate",
+                    "filename": "Xcode_26.2_Release_Candidate_Universal",
+                    "version": "26.2_Release_Candidate+17C48",
                     "symlinks": ["26.2"],
-                    "sha256": "eb8fd7fc889e940450c5a48600276810a011f36314c43d632253d0fc4d40e2c7",
+                    "sha256": "63743df751791508ac8e4f01a33e3f28f3a59a86ff3f33c8c155c3046daedf42",
                     "install_runtimes": "none"
                 },
                 {
@@ -26,18 +26,6 @@
                     "symlinks": ["26.0"],
                     "sha256": "9881c457068c86ac91e94cca2d7116dfd01cb7179c22b0863b63c7f3bb7e7695",
                     "install_runtimes": "default"
-                },
-                {
-                    "link": "16.4",
-                    "filename": "Xcode_16.4",
-                    "version": "16.4.0+16F6",
-                    "sha256": "2dbf65ba28fb85b34e72c14c529a42d5c3189ab0f11fb29fdebd5f4ee6c87900",
-                    "install_runtimes": [
-                        { "iOS": ["18.5", "18.6"] },
-                        { "watchOS": ["11.5"] },
-                        { "tvOS": ["18.5"] },
-                        { "visionOS": ["2.5"] }
-                    ]
                 }
             ]
         }