Remove superfluous line

Author: flashspys

Sources/SwiftDiagnostics/DiagnosticsFormatter.swift

@@ -25,7 +25,6 @@ public struct DiagnosticsFormatter {
 
   /// Print given diagnostics for a given syntax tree on the command line
   public static func annotatedSource(tree: SourceFileSyntax, diags: [Diagnostic]) -> String {
-    
     let slc = SourceLocationConverter(file: "", tree: tree)
 
     // First, we need to put each line and its diagnostics together