Remove unused ComparePrototypesFromSourceAndPreprocSource

Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl>

Author: matthijskooijman

src/arduino.cc/builder/compare_prototypes_from_source_and_preproc_source.go

@@ -65,7 +65,6 @@ type Context struct {
 	// C++ Parsing
 	CTagsOutput                 string
 	CTagsTargetFile             string
-	CTagsOfSource               []*CTag
 	CTagsOfPreprocessedSource   []*CTag
 	CTagsCollected              []*CTag
 	IncludeSection              string