No need to document drop_table in the PostgreSQLAdapter

It behaves in the same way that the abstract adapter.

[ci skip]

activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb

@@ -377,6 +377,9 @@ def rename_table(table_name, new_name)
       # [<tt>:force</tt>]
       #   Set to +:cascade+ to drop dependent objects as well.
       #   Defaults to false.
+      # [<tt>:if_exists</tt>]
+      #   Set to +true+ to only drop the table if it exists.
+      #   Defaults to false.
       #
       # Although this command ignores most +options+ and the block if one is given,
       # it can be helpful to provide these in a migration's +change+ method so it can be reverted.

activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb

@@ -573,6 +573,10 @@ def rename_table(table_name, new_name)
       # [<tt>:temporary</tt>]
       #   Set to +true+ to drop temporary table.
       #   Defaults to false.
+      #
+      # Although this command ignores most +options+ and the block if one is given,
+      # it can be helpful to provide these in a migration's +change+ method so it can be reverted.
+      # In that case, +options+ and the block will be used by create_table.
       def drop_table(table_name, options = {})
         execute "DROP#{' TEMPORARY' if options[:temporary]} TABLE#{' IF EXISTS' if options[:if_exists]} #{quote_table_name(table_name)}#{' CASCADE' if options[:force] == :cascade}"
       end

activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb

@@ -87,15 +87,7 @@ def table_exists?(name)
           SQL
         end
 
-        # Drops a table from the database.
-        #
-        # [<tt>:force</tt>]
-        #   Set to +:cascade+ to drop dependent objects as well.
-        #   Defaults to false.
-        # [<tt>:if_exists</tt>]
-        #   Set to +true+ to only drop the table if it exists.
-        #   Defaults to false.
-        def drop_table(table_name, options = {})
+        def drop_table(table_name, options = {}) # :nodoc:
           execute "DROP TABLE#{' IF EXISTS' if options[:if_exists]} #{quote_table_name(table_name)}#{' CASCADE' if options[:force] == :cascade}"
         end