Revert "Always pass event block to damage source (#12158)"

This reverts commit ab984a0711.

The block damage is null *and has been* null in cases where the block
has already been cleared. Consumers are supposed to use the
getDamagerBlockState instead.

paper-server/patches/sources/net/minecraft/world/damagesource/DamageSource.java.patch

@@ -1,6 +1,6 @@
 --- a/net/minecraft/world/damagesource/DamageSource.java
 +++ b/net/minecraft/world/damagesource/DamageSource.java
-@@ -20,6 +_,97 @@
+@@ -20,6 +_,92 @@
      private final Entity directEntity;
      @Nullable
      private final Vec3 damageSourcePosition;
@@ -60,16 +60,11 @@
 +        return this.fromBlockSnapshot;
 +    }
 +
-+    public DamageSource causingBlockSnapshot(
-+        final net.minecraft.world.level.LevelAccessor level,
-+        final net.minecraft.core.BlockPos pos,
-+        final @Nullable org.bukkit.block.BlockState blockState
-+    ) {
++    public DamageSource causingBlockSnapshot(final @Nullable org.bukkit.block.BlockState blockState) {
 +        if (this.eventBlockDamager != null) {
 +            throw new IllegalStateException("Cannot set a block snapshot when an event block damager is already set (report a bug to Paper)");
 +        }
 +        final DamageSource damageSource = this.copy();
-+        damageSource.eventBlockDamager = org.bukkit.craftbukkit.block.CraftBlock.at(level, pos);
 +        damageSource.fromBlockSnapshot = blockState;
 +        return damageSource;
 +    }

paper-server/patches/sources/net/minecraft/world/level/block/BedBlock.java.patch

@@ -59,7 +59,7 @@
 +        }
 +
 +        Vec3 center = pos.getCenter();
-+        level.explode(null, level.damageSources().badRespawnPointExplosion(center).causingBlockSnapshot(level, pos, blockState), null, center, 5.0F, true, Level.ExplosionInteraction.BLOCK); // CraftBukkit - add state
++        level.explode(null, level.damageSources().badRespawnPointExplosion(center).causingBlockSnapshot(blockState), null, center, 5.0F, true, Level.ExplosionInteraction.BLOCK); // CraftBukkit - add state
 +        return InteractionResult.SUCCESS_SERVER;
 +     }
 +    // CraftBukkit end

paper-server/patches/sources/net/minecraft/world/level/block/RespawnAnchorBlock.java.patch

@@ -31,7 +31,7 @@
          Vec3 center = pos2.getCenter();
          level.explode(
 -            null, level.damageSources().badRespawnPointExplosion(center), explosionDamageCalculator, center, 5.0F, true, Level.ExplosionInteraction.BLOCK
-+            null, level.damageSources().badRespawnPointExplosion(center).causingBlockSnapshot(level, pos2, blockState), explosionDamageCalculator, center, 5.0F, true, Level.ExplosionInteraction.BLOCK // CraftBukkit - add state
++            null, level.damageSources().badRespawnPointExplosion(center).causingBlockSnapshot(blockState), explosionDamageCalculator, center, 5.0F, true, Level.ExplosionInteraction.BLOCK // CraftBukkit - add state
          );
      }