Stop explicitly blocking Vanilla Method Profiler

At the time this was re-added, there was concern around how the JIT
would handle the system property that enabled it.

This shouldn't be a problem, and as such we no longer need to block
access to it.

The Vanilla Method Profiler will not provide much to most users however
there is no harm in providing it as an option. For most users, the
recommended and supported method for determining performance issues with
Paper will continue to be Timings.

Spigot-Server-Patches/Item-canEntityPickup.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Item#canEntityPickup
 
 
 diff --git a/src/main/java/net/minecraft/server/EntityInsentient.java b/src/main/java/net/minecraft/server/EntityInsentient.java
-index 5ea9f3097..89e878365 100644
+index 5ea9f309..89e87836 100644
 --- a/src/main/java/net/minecraft/server/EntityInsentient.java
 +++ b/src/main/java/net/minecraft/server/EntityInsentient.java
 @@ -0,0 +0,0 @@ public abstract class EntityInsentient extends EntityLiving {
@@ -22,7 +22,7 @@ index 5ea9f3097..89e878365 100644
                      this.a(entityitem);
                  }
 diff --git a/src/main/java/net/minecraft/server/EntityItem.java b/src/main/java/net/minecraft/server/EntityItem.java
-index 6593fc633..99dbb1393 100644
+index 6593fc63..99dbb139 100644
 --- a/src/main/java/net/minecraft/server/EntityItem.java
 +++ b/src/main/java/net/minecraft/server/EntityItem.java
 @@ -0,0 +0,0 @@ public class EntityItem extends Entity implements HopperPusher {
@@ -34,7 +34,7 @@ index 6593fc633..99dbb1393 100644
      private String g;
      private String h;
 diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java
-index a17a537d6..1df17f09b 100644
+index a17a537d..1df17f09 100644
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java
 @@ -0,0 +0,0 @@ public class CraftItem extends CraftEntity implements Item {