docgen: Remove unneccessary argument from Array#pop (#15397)

Author: aduth

packages/docgen/CHANGELOG.md

@@ -1,3 +1,9 @@
+## Master
+
+### Internal
+
+- Remove unneccessary argument from an instance of `Array#pop`.
+
 ## 1.0.0 (2019-03-06)
 
 - Initial release

packages/docgen/src/index.js

@@ -51,7 +51,7 @@ const processFile = ( rootDir, inputFile ) => {
 		currentFileStack.push( inputFile );
 		const relativePath = path.relative( rootDir, inputFile );
 		const result = engine( relativePath, data, getIRFromRelativePath( rootDir, last( currentFileStack ) ) );
-		currentFileStack.pop( inputFile );
+		currentFileStack.pop();
 		return result;
 	} catch ( e ) {
 		process.stderr.write( `\n${ e }` );