Remove an unnecessary String.trim

This is already handled by the following elimination of all whitespace
and avoids an unnecessary allocation.

Author: ibbem

src/main/java/org/variantsync/diffdetective/feature/CPPDiffLineFormulaExtractor.java

@@ -48,7 +48,6 @@ public String extractFormula(final String line) throws IllFormedAnnotationExcept
         fm = COMMENT_PATTERN.matcher(fm).replaceAll("");
 
         // remove whitespace
-        fm = fm.trim();
         fm = fm.replaceAll("\\s", "");
 
         // remove defined()