Revert "[11.x] Added dropColumnsIfExists, dropColumnIfExists and …

…`dropFor…"

This reverts commit b6e478d.

src/Illuminate/Database/Schema/Blueprint.php

@@ -9,7 +9,6 @@
 use Illuminate\Database\Schema\Grammars\Grammar;
 use Illuminate\Database\Schema\Grammars\MySqlGrammar;
 use Illuminate\Database\Schema\Grammars\SQLiteGrammar;
-use Illuminate\Support\Facades\Schema;
 use Illuminate\Support\Fluent;
 use Illuminate\Support\Traits\Macroable;
 
@@ -428,25 +427,6 @@ public function dropColumn($columns)
         return $this->addCommand('dropColumn', compact('columns'));
     }
 
-    /**
-     * Indicate that the given columns should be dropped if they exist.
-     *
-     * @param  array|mixed  $columns
-     * @return \Illuminate\Support\Fluent
-     */
-    public function dropColumnIfExists($columns)
-    {
-        $columns = is_array($columns) ? $columns : func_get_args();
-
-        $columns = array_intersect($columns, Schema::getColumnListing($this->getTable()));
-
-        if (empty($columns)) {
-            return new Fluent;
-        }
-
-        return $this->dropColumn($columns);
-    }
-
     /**
      * Indicate that the given columns should be renamed.
      *
@@ -525,25 +505,6 @@ public function dropForeign($index)
         return $this->dropIndexCommand('dropForeign', 'foreign', $index);
     }
 
-    /**
-     * Indicate that the given foreign key should be dropped if it exists.
-     *
-     * @param  string|array  $index
-     * @return \Illuminate\Support\Fluent
-     */
-    public function dropForeignIfExists($index)
-    {
-        if (is_array($index)) {
-            $index = $this->createIndexName('foreign', $index);
-        }
-
-        if (! in_array($index, Schema::getForeignKeys($this->getTable()))) {
-            return new Fluent;
-        }
-
-        return $this->dropIndexCommand('dropForeign', 'foreign', $index);
-    }
-
     /**
      * Indicate that the given column and foreign key should be dropped.
      *

src/Illuminate/Database/Schema/Builder.php

@@ -462,20 +462,6 @@ public function dropColumns($table, $columns)
         });
     }
 
-    /**
-     * Drop columns from a table schema if they exist.
-     *
-     * @param  string  $table
-     * @param  string|array  $columns
-     * @return void
-     */
-    public function dropColumnsIfExists($table, $columns)
-    {
-        $this->table($table, function (Blueprint $blueprint) use ($columns) {
-            $blueprint->dropColumnIfExists($columns);
-        });
-    }
-
     /**
      * Drop all tables from the database.
      *