Remove leftover log message from debug session

Instead of logging at info level, log it with debug, only and remove the
unnecessary creation of a RuntimeException.

Cleanup after commit bb0c455
Bugzilla Id: 65013

Author: FSchumacher

src/protocol/http/src/main/java/org/apache/jmeter/protocol/http/curl/BasicCurlParser.java

@@ -989,7 +989,7 @@ private String getPostDataByDifferentOption(final String originalPostdata, Strin
    }
 
    private String unquote(String value) {
-       LoggerFactory.getLogger(this.getClass()).info("Unquote {}", value, new RuntimeException(""));
+       LoggerFactory.getLogger(this.getClass()).debug("Unquote {}", value);
        if (value.charAt(0) == '"') {
            String result = value.substring(1, value.length() - 1);
            return result.replaceAll("\\\\(.)", "$1");