Revert "Add VISIT_RISKY_URIS flag."

This reverts commit d12e70a12a8f73f98e683f01cd06abd329b0f445.

Reason for revert: this was replaced by an aconfig flag

Fix: 301242692

Change-Id: Ia704a00b922fcd21cd4edaec4b1da48957109ddf

core/java/com/android/internal/config/sysui/SystemUiSystemPropertiesFlags.java

diff --git a/core/java/com/android/internal/config/sysui/SystemUiSystemPropertiesFlags.java b/core/java/com/android/internal/config/sysui/SystemUiSystemPropertiesFlags.java
index 7be27be..1bd0982 100644
--- a/core/java/com/android/internal/config/sysui/SystemUiSystemPropertiesFlags.java
+++ b/core/java/com/android/internal/config/sysui/SystemUiSystemPropertiesFlags.java
@@ -87,10 +87,6 @@
         public static final Flag NOTIF_COOLDOWN_RULE = devFlag(
                 "persist.debug.sysui.notification.notif_cooldown_rule", "rule1");
 
-        /** b/301242692: Visit extra URIs used in notifications to prevent security issues. */
-        public static final Flag VISIT_RISKY_URIS = devFlag(
-                "persist.sysui.notification.visit_risky_uris");
-
         /** b/303716154: For debugging only: use short bitmap duration. */
         public static final Flag DEBUG_SHORT_BITMAP_DURATION = devFlag(
                 "persist.sysui.notification.debug_short_bitmap_duration");