refactor: simplify call signature

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
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    status: passed
  - task: lint_editorconfig
    status: passed
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    status: na
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    status: passed
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    status: passed
---

Author: kgryte

lib/node_modules/@stdlib/plot/vega/base/spec2svg/lib/main.js

@@ -48,9 +48,9 @@ function spec2svg( spec, theme, clbk ) {
 		cb = theme;
 	}
 	view = new vega.View( runtime, {
-		'renderer': 'svg'
+		'renderer': 'none'
 	});
-	view.initialize().toSVG().then( onResolve, onReject );
+	view.toSVG().then( onResolve, onReject );
 
 	/**
 	* Callback invoked upon success.