remove UseArduinoPreprocessor from legacy context

Author: alessio-perugini

legacy/builder/builder.go

@@ -140,9 +140,6 @@ func (s *Builder) Run(ctx *types.Context) error {
 
 func PreprocessSketch(ctx *types.Context) error {
 	preprocessorImpl := preprocessor.PreprocessSketchWithCtags
-	if ctx.UseArduinoPreprocessor {
-		preprocessorImpl = preprocessor.PreprocessSketchWithArduinoPreprocessor
-	}
 	normalOutput, verboseOutput, err := preprocessorImpl(
 		ctx.Sketch, ctx.BuildPath, ctx.SketchLibrariesDetector.IncludeFolders(), ctx.LineOffset,
 		ctx.BuildProperties, ctx.OnlyUpdateCompilationDatabase)

legacy/builder/types/context.go

@@ -112,9 +112,6 @@ type Context struct {
 	// Custom build properties defined by user (line by line as "key=value" pairs)
 	CustomBuildProperties []string
 
-	// Experimental: use arduino-preprocessor to create prototypes
-	UseArduinoPreprocessor bool
-
 	// Parallel processes
 	Jobs int