[TASK] Remove the deprecated OutputFormat::level() (#874)

This method is an inconsistently-named alias of
`OutputFormat::getIndentationLevel()`.

Fixes #869

---------

Co-authored-by: JakeQZ <jake.github@qzdesign.co.uk>

Author: oliverklee

CHANGELOG.md

@@ -28,6 +28,7 @@ Please also have a look at our
 
 ### Removed
 
+- Remove `OutputFormat::level()` (#874)
 - Remove expansion of shorthand properties (#838)
 - Remove `Parser::setCharset/getCharset` (#808)
 - Remove `Rule::getValues()` (#582)

src/OutputFormat.php

@@ -287,14 +287,6 @@ public function getFormatter()
         return $this->oFormatter;
     }
 
-    /**
-     * @return int
-     */
-    public function level()
-    {
-        return $this->iIndentationLevel;
-    }
-
     /**
      * Creates an instance of this class without any particular formatting settings.
      */

src/OutputFormatter.php

@@ -208,6 +208,6 @@ private function prepareSpace($sSpaceString): string
      */
     private function indent(): string
     {
-        return \str_repeat($this->oFormat->sIndentation, $this->oFormat->level());
+        return \str_repeat($this->oFormat->sIndentation, $this->oFormat->getIndentationLevel());
     }
 }

tests/Unit/OutputFormatTest.php

@@ -833,17 +833,6 @@ public function getFormatterCalledTwoTimesReturnsSameInstance(): void
         self::assertSame($firstCallResult, $secondCallResult);
     }
 
-    /**
-     * @test
-     */
-    public function levelReturnsIndentationLevel(): void
-    {
-        $value = 4;
-        $this->subject->setIndentationLevel($value);
-
-        self::assertSame($value, $this->subject->level());
-    }
-
     /**
      * @test
      */